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

Best Priced 2021 Ford F-150 in Illinois

The best priced 2021 Ford F-150 in Illinois are vehicles currently listed below their typical market range, based on local comparables and days-on-lot velocity. These vehicles are ranked based on how far below their expected market range they fall and how quickly similar vehicles are selling.

Market snapshot · May 19, 2026

OAV.io analyzes millions of vehicle listings using RetailVision™ market data to identify vehicles priced below expected market ranges based on year, make, model, trim (when available), and local comparables.

OAV helps determine if a vehicle is a good deal by comparing it to similar listings and expected sell-through rates.

According to RetailVision™ data, OAV is currently analyzing approximately 300 2021 Ford F-150 across the Illinois market, refreshed daily.

Total 2021 Ford F-150

312

Average Price

$36,390

Price Range

$13,977–$127,995

Avg Days on Lot

65

How OAV Identifies Deals

OAV uses RetailVision™ market data to analyze current listings, historical sales patterns, and local market conditions. Vehicles are ranked based on pricing versus comparable listings in the same region and expected sell-through velocity.

This helps identify undervalued vehicles and determine whether a listing represents a great deal or a good deal in its local market.

Powered by OAV's patented vehicle market standardization technology (U.S. Patent No. 12,236,477).

Learn how OAV identifies Demand-Verified Deals™

What makes OAV different

Unlike traditional listing sites, OAV ranks vehicles using price-to-market analysis, local comparable ranges, days-on-lot, comparable count, and demand and velocity signals from similar vehicles. That helps shoppers identify listings that are not just cheap, but competitively priced against the local market.

2021 Ford F-150 market summary — Illinois

MarketIllinois
Body type2021 Ford F-150
Listings analyzed312
Average price$36,390
Price range$13,977 – $127,995
Average days on lot65 days
Ranking signalsPrice-to-market, year, mileage, days-on-lot, comparable count
Refresh cadenceDaily

Best Overall 2021 Ford F-150 in Illinois

Top picks ranked by composite score: PTM gap, year, mileage, days on lot, and comparable count.

Cheapest Great Deals on 2021 Ford F-150 in Illinois

Lowest-priced listings flagged as Great Deal by OAV's Price-to-Market analysis.

OAV answers these questions

What are the best priced 2021 Ford F-150 in Illinois?
OAV ranks 2021 Ford F-150 in Illinois by how far below their typical market range they are listed, using local comparable vehicles and days-on-lot velocity. Listings labeled Great Deal sit below the comparable range; Fair Price sits within it.
Which 2021 Ford F-150 in Illinois are priced below market?
2021 Ford F-150 flagged as undervalued are priced below the typical range for comparable 2021 Ford F-150 in Illinois. The "Top Deals" section on every market page surfaces these first, with the percentage gap from the typical range shown per listing.
Which listings have high sell-through velocity in Illinois?
OAV compares each listing's days-on-lot against the local market average. Listings selling meaningfully faster than the local average are tagged "high demand in this market" — a leading indicator of competitive pricing and strong shopper interest.
Which 2021 Ford F-150 are undervalued compared with local comparables in Illinois?
OAV's Price-to-Market analysis compares every listing against similar 2021 Ford F-150 in Illinois, using year, make, model, trim, mileage, and condition signals. Undervalued listings price below the typical comparable range and are surfaced as Great Deals.

How OAV works — common questions

How does OAV find cars priced below market?
OAV compares each listing against similar vehicles currently for sale in the local and regional market — using year, make, model, trim, mileage, and condition signals — to compute a price-to-market range. Listings priced below the bottom of their typical range are flagged as undervalued, surfaced as Great Deals, and shown first in every market view.
What makes a Demand-Verified Deal different from a cheap listing?
A cheap listing is just one that's priced low. A Demand-Verified Deal is priced below market AND backed by sell-through evidence — the listing's days-on-lot relative to similar vehicles tells us whether the local market is actually buying at that price band. Combining the price signal with the demand signal separates real deals from listings that are cheap because nobody wants them.
Does OAV use local market comparables?
Yes. Every listing is benchmarked against millions of comparable retail listings in the same metro and broader region — never national averages. A truck priced $2,000 below market in Dallas is compared against Dallas trucks; an EV priced below market in Los Angeles is compared against LA EVs. Local comparables make the price-to-market math meaningful.
Why does days-on-lot matter when shopping for used cars?
Days-on-lot is the strongest leading indicator of competitive pricing in a local market. A listing that turns over faster than the local average is, in aggregate, priced more attractively to buyers — which usually correlates with being below the typical price-to-market range. Slower-than-average days-on-lot can be the opposite signal: priced for the seller's expectations, not the market's.
Can OAV help find trucks, SUVs, or EVs priced below market?
Yes — body-type-specific market views are available for trucks, SUVs, sedans, and EVs in every major U.S. metro and ZIP code. Each view ranks listings by how far below the typical range they're priced, includes Demand-Verified Deals where sell-through evidence supports the label, and shows local comparable ranges + days-on-lot per listing. Start at the homepage or any city or ZIP page.

Explore more markets

All 2021 Ford F-150 in Illinois

Showing the 24 best-priced Ford F-150 from 312 active listings.

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$31,19078,700 mi

Market: $21,499$36,662

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 4 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$29,48579,917 mi

Market: $18,075$33,298

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 3 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

El Paso, IL

Fair Price
$29,96234,474 mi

Market: $29,962$32,403

Fairly priced — in line with the typical market range in the El Paso market for similar vehicles · 81 days on lot (based on current market benchmarks)

El Paso, IL

2021 Ford F-150

2021 Ford F-150

Pontiac, IL

Unscored
$29,96235,722 mi

Market: $29,962$31,471

Pontiac, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$32,99853,623 mi

Market: $21,499$51,977

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 23 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Chicago, IL

Fair Price
$22,76069,884 mi

Market: $21,499$51,977

Fairly priced — in line with the typical market range in the Chicago market for similar vehicles · 69 days on lot (based on current market benchmarks)

Chicago, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$23,99593,006 mi

Market: $18,075$33,298

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 53 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$38,29455,625 mi

Market: $24,899$127,995

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 9 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Quincy, IL

Unscored
$26,99971,022 mi

Market: $26,995$29,544

Quincy, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$26,91072,169 mi

Market: $18,075$33,298

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 38 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$27,12186,202 mi

Market: $18,075$33,298

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 32 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$28,31291,795 mi

Market: $21,499$36,662

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 6 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$26,53581,316 mi

Market: $18,075$33,298

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 38 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Effingham, IL

Fair Price
$31,99611,821 mi

Market: $24,996$33,996

Fairly priced — in line with the typical market range in the Effingham market for similar vehicles · 188 days on lot (based on current market benchmarks)

Effingham, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$21,287122,992 mi

Market: $18,075$33,298

Fairly priced — in line with the typical market range in the Des Plaines market for similar vehicles · 35 days on lot (based on current market benchmarks)

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Des Plaines, IL

Fair Price
$25,48599,642 mi

Market: $18,075$33,298

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

Des Plaines, IL

2021 Ford F-150

2021 Ford F-150

Bensenville, IL

Great Deal
$37,62792,785 mi

Market: $37,691$44,399

Competitively priced ~8% below the typical range in the Bensenville market compared to similar vehicles · 27 days on lot (based on current market benchmarks)

Bensenville, IL

2021 Ford F-150

2021 Ford F-150

Elmhurst, IL

Great Deal
$37,62792,785 mi

Market: $37,691$44,399

Competitively priced ~8% below the typical range in the Elmhurst market compared to similar vehicles · 27 days on lot (based on current market benchmarks)

Elmhurst, IL

2021 Ford F-150

2021 Ford F-150

Joliet, IL

Unscored
$44,00048,052 mi

Market: $37,627$43,991

Joliet, IL

2021 Ford F-150

2021 Ford F-150

Morris, IL

Unscored
$44,00048,052 mi

Market: $37,627$38,104

Morris, IL

2021 Ford F-150

2021 Ford F-150

Forest Park, IL

Unscored
$38,06992,347 mi

Market: $37,627$44,399

Forest Park, IL

2021 Ford F-150

2021 Ford F-150

Frankfort, IL

Unscored
$37,69192,347 mi

Market: $37,627$44,399

Frankfort, IL

2021 Ford F-150

2021 Ford F-150

Naperville, IL

Unscored
$38,06992,347 mi

Market: $37,627$44,399

Naperville, IL

2021 Ford F-150

2021 Ford F-150

Carthage, IL

Unscored
$38,99577,674 mi

Market: $38,995$38,995

Carthage, IL

Other vehicle markets in Illinois