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U.S. Patent No. 12,236,477 — Patented Automotive Data Standardization Technology
OAV

The Automotive Answer Engine

Every car has an answer. We hold the evidence.

Ask about a VIN, price, or market. OAV returns an independent, snapshot-dated answer and the market evidence behind it — a verdict where the evidence supports one, and the evidence itself where it doesn't.

Found a car anywhere? Paste the VIN — OAV resolves it against the supported comparable range, drawn from millions of dealer-advertised listings. Dealers can't pay to change a verdict.

OAV.io is an independent automotive market-evidence platform. It evaluates asking prices against comparable listings and publishes a Price-to-Market verdict when the evidence supports one. Days-on-lot and sell-through from similar vehicles are separate demand evidence, never inputs to the Price-to-Market verdict.

Market snapshot · October 22, 2026

6M+

Unique vehicles analyzed

as of October 21, 2026

56,000+

US dealerships

Daily

Data pipeline

Comparable

Market-evidence analysis

3.3M new·2.7M used·Listings processed daily

Or explore the market

56 listings found

No Photo

2004 Toyota Sienna LE

Spearfish, SD

UnscoredInsufficient · 0
$2,789313,216 mi

Spearfish, SD

2010 Toyota Sienna CE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2010 Toyota Sienna CE

Sioux Falls, SD

UnscoredInsufficient · 0
$3,250265,331 mi

Sioux Falls, SD

2013 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2013 Toyota Sienna XLE

Brandon, SD

UnscoredInsufficient · 0
$4,999287,434 mi

Brandon, SD

2010 Toyota Sienna CE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2010 Toyota Sienna CE

Chamberlain, SD

UnscoredInsufficient · 0
$5,988152,624 mi

Chamberlain, SD

2007 Toyota Sienna CE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2007 Toyota Sienna CE

Sioux Falls, SD

UnscoredInsufficient · 0
$6,200197,502 mi

Sioux Falls, SD

2013 Toyota Sienna Limited

Image from the dealer's site. OAV does not own, control, or store dealer images.

2013 Toyota Sienna Limited

Chamberlain, SD

UnscoredInsufficient · 0
$8,988150,605 mi

Chamberlain, SD

2011 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2011 Toyota Sienna XLE

Sioux Falls, SD

UnscoredLimited · 5
$8,995188,000 mi

Comparison: 5 similar vehicles

Sioux Falls, SD

2014 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2014 Toyota Sienna LE

Watertown, SD

UnscoredLimited · 7
$12,850189,125 mi

Comparison: 7 similar vehicles

Watertown, SD

2017 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2017 Toyota Sienna LE

Sioux Falls, SD

UnscoredLimited · 6
$13,995121,852 mi

Comparison: 6 similar vehicles

Sioux Falls, SD

2015 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2015 Toyota Sienna XLE

Rapid City, SD

UnscoredInsufficient · 0
$14,995124,246 mi

Rapid City, SD

2017 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2017 Toyota Sienna XLE

Sioux Falls, SD

UnscoredLimited · 6
$19,210132,473 mi

Comparison: 6 similar vehicles

Sioux Falls, SD

2020 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2020 Toyota Sienna LE

Rapid City, SD

UnscoredInsufficient · 0
$20,269134,059 mi

Rapid City, SD

2011 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2011 Toyota Sienna XLE

Sioux Falls, SD

UnscoredLimited · 5
$21,500124,339 mi

Comparison: 5 similar vehicles

Sioux Falls, SD

2017 Toyota Sienna XLE Premium

Image from the dealer's site. OAV does not own, control, or store dealer images.

2017 Toyota Sienna XLE Premium

Watertown, SD

UnscoredInsufficient · 3
$21,90092,076 mi

Comparison: 3 similar vehicles

Watertown, SD

2020 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2020 Toyota Sienna LE

Vermillion, SD

UnscoredInsufficient · 4
$23,99596,780 mi

Comparison: 4 similar vehicles

Vermillion, SD

2021 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2021 Toyota Sienna XLE

Sioux Falls, SD

UnscoredLimited · 5
$24,124160,583 mi

Comparison: 5 similar vehicles

Sioux Falls, SD

2017 Toyota Sienna XLE Premium

Image from the dealer's site. OAV does not own, control, or store dealer images.

2017 Toyota Sienna XLE Premium

Sioux Falls, SD

OverpricedLimited · 13
$24,25995,458 mi

Market: $15,224 – $21,900

Comparison: 13 similar vehicles

Priced ~11% above the typical market range for similar vehicles (based on current market benchmarks)

Sioux Falls, SD

2020 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2020 Toyota Sienna LE

Sioux Falls, SD

UnscoredInsufficient · 0
$25,80085,134 mi

Sioux Falls, SD

2022 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2022 Toyota Sienna LE

Rapid City, SD

UnscoredInsufficient · 0
$29,50076,980 mi

Rapid City, SD

2022 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2022 Toyota Sienna LE

Sioux Falls, SD

OverpricedModerate · 25
$33,92874,877 mi

Market: $28,992 – $32,850

Comparison: 25 similar vehicles

Priced ~3% above the typical market range for similar vehicles (based on current market benchmarks)

Sioux Falls, SD

2021 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2021 Toyota Sienna LE

Sioux Falls, SD

OverpricedModerate · 21
$35,95063,300 mi

Market: $26,294 – $28,250

Comparison: 21 similar vehicles

Priced ~27% above the typical market range for similar vehicles (based on current market benchmarks)

Sioux Falls, SD

2024 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2024 Toyota Sienna XLE

Spearfish, SD

UnscoredInsufficient · 0
$39,85248,569 mi

Spearfish, SD

2025 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2025 Toyota Sienna LE

Yankton, SD

Fair PriceModerate · 21
$41,49528,426 mi

Market: $34,950 – $41,819

Comparison: 21 similar vehicles

Fairly priced — in line with the typical market range for similar vehicles · 51 days listed (based on current market benchmarks)

Yankton, SD

2017 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2017 Toyota Sienna XLE

Sioux Falls, SD

UnscoredInsufficient · 0
$42,00029,227 mi

Sioux Falls, SD

2017 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2017 Toyota Sienna XLE

Sioux Falls, SD

UnscoredInsufficient · 0
$42,00028,930 mi

Sioux Falls, SD

2025 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2025 Toyota Sienna LE

Rapid City, SD

UnscoredInsufficient · 0
$42,49726,441 mi

Rapid City, SD

2025 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2025 Toyota Sienna LE

Sioux Falls, SD

UnscoredInsufficient · 0
$43,46818,112 mi

Sioux Falls, SD

2025 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2025 Toyota Sienna XLE

Rapid City, SD

UnscoredInsufficient · 0
$43,49254,403 mi

Rapid City, SD

2026 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna LE

Sioux Falls, SD

UnscoredInsufficient · 4
$44,518Mileage not verified

Comparison: 4 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna LE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna LE

Sioux Falls, SD

UnscoredInsufficient · 4
$46,193Mileage not verified

Comparison: 4 similar vehicles

Sioux Falls, SD

2024 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2024 Toyota Sienna XLE

Sioux Falls, SD

UnscoredInsufficient · 0
$47,29833,477 mi

Sioux Falls, SD

2026 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna XLE

Aberdeen, SD

Fair PriceLimited · 17
$50,815Mileage not verified

Market: $49,439 – $54,415

Comparison: 17 similar vehicles

Fairly priced — in line with the typical market range for similar vehicles · 16 days listed (based on current market benchmarks)

Aberdeen, SD

2026 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna XLE

Sioux Falls, SD

UnscoredLimited · 5
$53,618Mileage not verified

Comparison: 5 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna XSE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna XSE

Sioux Falls, SD

UnscoredLimited · 7
$53,751Mileage not verified

Comparison: 7 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna XSE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna XSE

Sioux Falls, SD

UnscoredLimited · 7
$53,998Mileage not verified

Comparison: 7 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna XLE

Sioux Falls, SD

UnscoredLimited · 5
$54,048Mileage not verified

Comparison: 5 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna XLE

Sioux Falls, SD

UnscoredInsufficient · 4
$54,128Mileage not verified

Comparison: 4 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna XLE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna XLE

Pierre, SD

UnscoredInsufficient · 0
$54,415Mileage not verified

Pierre, SD

2026 Toyota Sienna Woodland Edition

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Woodland Edition

Rapid City, SD

UnscoredInsufficient · 0
$54,509Mileage not verified

Rapid City, SD

2026 Toyota Sienna Woodland Edition

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Woodland Edition

Rapid City, SD

UnscoredInsufficient · 0
$54,759Mileage not verified

Rapid City, SD

2026 Toyota Sienna Woodland Edition

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Woodland Edition

Sioux Falls, SD

UnscoredInsufficient · 4
$55,053Mileage not verified

Comparison: 4 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna XSE

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna XSE

Rapid City, SD

UnscoredInsufficient · 0
$55,253Mileage not verified

Rapid City, SD

2026 Toyota Sienna Woodland Edition

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Woodland Edition

Sioux Falls, SD

UnscoredInsufficient · 4
$56,468Mileage not verified

Comparison: 4 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna Woodland Edition

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Woodland Edition

Sioux Falls, SD

UnscoredInsufficient · 4
$56,938Mileage not verified

Comparison: 4 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna Limited

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Limited

Aberdeen, SD

Fair PriceLimited · 18
$57,785Mileage not verified

Market: $55,965 – $60,122

Comparison: 18 similar vehicles

Fairly priced — in line with the typical market range for similar vehicles · 19 days listed (based on current market benchmarks)

Aberdeen, SD

2026 Toyota Sienna Limited

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Limited

Sioux Falls, SD

UnscoredInsufficient · 3
$58,076Mileage not verified

Comparison: 3 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna Limited

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Limited

Sioux Falls, SD

UnscoredInsufficient · 4
$58,427Mileage not verified

Comparison: 4 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna Limited

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Limited

Aberdeen, SD

Fair PriceLimited · 18
$58,434Mileage not verified

Market: $55,965 – $60,122

Comparison: 18 similar vehicles

Fairly priced — in line with the typical market range for similar vehicles · 21 days listed (based on current market benchmarks)

Aberdeen, SD

2026 Toyota Sienna Limited

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Limited

Sioux Falls, SD

UnscoredInsufficient · 4
$58,643Mileage not verified

Comparison: 4 similar vehicles

Sioux Falls, SD

2026 Toyota Sienna Limited

Image from the dealer's site. OAV does not own, control, or store dealer images.

2026 Toyota Sienna Limited

Watertown, SD

Fair PriceModerate · 21
$59,199Mileage not verified

Market: $55,965 – $60,122

Comparison: 21 similar vehicles

Fairly priced — in line with the typical market range for similar vehicles · 8 days listed (based on current market benchmarks)

Watertown, SD

Trust signal layer

Demand-Verified Deals™

The Demand-Verified badge is sell-through evidence — the matched cohort of similar vehicles is selling faster than its market baseline, and this listing is still within the cohort’s typical selling window. It is separate from OAV’s price verdict. A Demand-Verified Deal is a listing that carries the badge and is also rated Great Deal (priced below the comparable-range floor by at least OAV's minimum-gap margin). The Deal is the intersection of the two signals. Each Demand-Verified listing shows its cohort’s typical sell-time, its days-on-lot, and a comparable count. Listings without sufficient, fresh cohort coverage get no label, and the section hides itself when none on a page qualify, so the signal stays honest.

Current status: the Demand-Verified badge is withheld on every listing while OAV re-validates the sell-through claim behind it, so no Top Demand-Verified Deals section is showing anywhere on the site right now. The sell-through evidence itself still appears on listings where a cohort supports it, and Price-to-Market verdicts are unaffected. The badge returns only if the re-validation confirms the claim.

See the full Demand-Verified Deals methodology for the labeling rules and examples.

Example market pages

OAV answers these questions

What are the best priced vehicles?
Great Deal means priced below the comparable-range floor by at least OAV's minimum-gap margin; Fair Price means priced within the comparable range, or below the floor by less than that margin.
Which vehicles are priced below market?
Vehicles rated Great Deal are priced below the comparable-range floor by at least OAV's minimum-gap margin. Each one links to its vehicle page.
Which listings are Demand-Verified?
A listing is Demand-Verified when the matched sold cohort of similar vehicles is moving faster than its market baseline, the cohort meets minimum-sample and freshness requirements, and this specific listing has not aged beyond the cohort's typical selling window. It is sell-through evidence about demand, and is separate from OAV's price-to-market verdict.
Which vehicles are priced below comparable listings?
OAV's Price-to-Market analysis compares a listing's asking price against similar cars, using year, make, model, geography, and available configuration attributes, with trim/configuration matching applied where sufficient comparable data supports it. Mileage is never used to select comparables or adjust their prices. OAV withholds a verdict when mileage looks unreliable, or when higher-than-typical mileage, not a market discount, better explains a lower price. Over 120,000 miles, OAV still publishes Overpriced but withholds Great Deal and Fair Price: comparable cars usually have fewer miles, which can make those two verdicts misleading. Where OAV publishes a verdict, a listing priced below the comparable-range floor by at least OAV's minimum-gap margin is rated Great Deal; one priced within the comparable range, or below the floor by less than that margin, is Fair Price.

How OAV.io compares with CarGurus, Cars.com and TrueCar

  • Carfax provides vehicle history reports and lists used cars for sale, showing how each price compares to its CARFAX Value.
  • CarGurus gives listings Deal Ratings based on its Instant Market Value (IMV), its estimate of a fair market price for a specific vehicle in a specific market.
  • Cars.com shows deal badges that compare a listing's price to similar vehicles in the same market.
  • Edmunds publishes car reviews and provides deal ratings on new and used listings.
  • iSeeCars analyzes and scores every listing and compares each price with the market price of similar vehicles for sale.
  • J.D. Power, which acquired the NADA Used Car Guide and NADAguides.com, publishes vehicle pricing and values.
  • TrueCar shows what others in your area paid for similar vehicles and connects shoppers with its Certified Dealers.

OAV.io is not a marketplace and does not sell cars. It helps shoppers find new and used cars at dealerships and evaluates each listing VIN by VIN against comparable listings, showing the comparable count, market range and as-of date for each rated listing. Its rating thresholds are published, thin evidence means Unscored, and dealers cannot pay to change an OAV.io rating, its eligibility or a listing's placement on OAV.io. Ratings are not guarantees of price or value, nor statements about a dealer in general.

How OAV.io compares

CarGurus, Instant Market Value, Deal Ratings, Cars.com, iSeeCars, TrueCar, TrueCar Price Graph, Edmunds, J.D. Power, NADA Used Car Guide, NADAguides, Carfax and CARFAX Value are trademarks of their respective owners. OAV.io is not affiliated with, sponsored by or endorsed by any of them.

How OAV works

How does OAV rate vehicle deals?
OAV compares a listing's asking price against similar vehicles currently for sale and publishes a Price-to-Market verdict only when the evidence supports one. OAV rates scored listings as Great Deal (priced below the comparable-range floor by at least OAV's minimum-gap margin), Fair Price (priced within the comparable range, or below the floor by less than that margin), or Overpriced (priced above the comparable range). Listings OAV cannot score on the available evidence are shown as Unscored rather than receiving an unsupported verdict. Ratings are recomputed as OAV processes new inventory data through its daily pipeline; each page shows the market snapshot used for its analysis.
How fresh is OAV's vehicle data?
OAV processes inventory, pricing, and days-on-lot data daily from the dealer source. Every market page and VIN page carries a “Market snapshot” timestamp showing the snapshot date the page was built from, so the exact data vintage is always visible.
Does OAV include days on lot?
Yes. OAV records days-on-lot from the dealer feed when the feed supplies it. Days-on-lot is a separate demand signal, never an input to the Price-to-Market verdict.
Are OAV dealers verified?
Dealer profiles include public market summaries from live inventory data — make mix, deal mix, average days on lot, market position. Claimed OAV dealers route inbound buyer inquiries and control verified contact information. Paid RetailVision™ subscribers unlock deeper analytics: per-listing comparable counts, market context drill-downs, inventory health, pricing recommendations, competitive benchmarking, alerts, and exports.
What technology powers OAV's deal ratings?
Certain vehicle market-standardization methods are covered by U.S. Patent No. 12,236,477; the Price-to-Market verdict method is the subject of a pending U.S. patent application. The standardization technology normalizes naming conventions and deduplicates cross-listed inventory across the dealership network, so every comparable-market calculation is drawn from a clean, unified data set.

Related questions

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