Is the $28,294 price on this 2018 Audi S4 a good deal?

OAV rates this as Fair Price because the asking price of $28,294 is within the typical market range for this vehicle.

What is the average price for a 2018 Audi S4 in IL?

Based on 14 comparable listings in IL, the average asking price for a 2016-2020 Audi S4 is $28,983, with prices ranging from $13,725 to $36,895.

How long does a 2018 Audi S4 typically stay on dealer lots?

Comparable Audi S4 listings in IL spend an average of 30 days on dealer lots.

Where is this 2018 Audi S4 located?

This vehicle is listed in St. Charles, IL 60174. VIN: WAUC4AF40JA120486. Mileage: 66,903 miles.

No Photo Available

Vehicle Details

VINWAUC4AF40JA120486

TrimPrestige

Exterior ColorBlack

Drivetrain4WD

Engine3.0L V6

TransmissionAutomatic

Fuel TypePremium Unleaded

Inventory Typeused

Days on Lot2

2018 Audi S4

Prestige

Unscored

$28,29466,903 mi

St. Charles, IL 60174

Is this 2018 Audi S4 Prestige a good deal?

OAV verdict: Unscored

Why: Listed at $28,294, comparable market range $28,294–$28,294. Days on lot: 2 days (market average 30 days).

Market price position

$28,294 · only listing at this price

$28,294 — single data point

Regional range: $28,294 (0 listings)
vs. market: Exact match — no spread
Comparable vehicles: 0

Market Retail Price (MRP™)

$28,294

This vehicle $28,294 · priced at MRP

MRP™ is the midpoint of the comparable market range — the representative price the market is asking for similar vehicles. How MRP works.

True Retail Value (TRV™)

$26,786

This vehicle $28,294 · $1,508 (6%) above TRV

TRV™ is the average paid price for cars like this in the last 60 days (sold data through 2026-07-28) — an estimate, not an appraisal. How TRV works.

Demand-Verified· Backed by recent sales data

Faster-than-average sell-through

Similar vehicles recently sold in an estimated 9–36 days.

What does Demand-Verified mean?

Market Breakdown

Local = comparable listings in the same metro. Regional = comparable listings across the broader state or multi-state region. Both ranges are rebuilt from the market snapshot shown above.

Regional Range$26,911 – $26,911

Audi Exchange St. Charles

St. Charles, IL

OAV routes your inquiry; pricing, taxes, fees, and availability come from the dealer.

View all vehicles from audi exchange st. charles →

Request availability and out-the-door price

OAV will route your inquiry to Audi Exchange St. Charles for current availability of this 2018 Audi S4 Prestige and an out-the-door price quote (taxes, fees, addons included).

OAV routes your inquiry; pricing, taxes, fees, and availability come from the dealer.

About This 2018 Audi S4

Listing updated: Jul 28, 2026

Listed by a franchise dealer in St. Charles, IL · On lot for 2 days · VIN verifiable at NHTSA

This used 2018 Audi S4 Prestige is listed at $28,294 by audi exchange st. charles in St. Charles, IL 60174. It has 66,903 miles on the odometer. The exterior color is Black. It features a 4WD drivetrain with a 3.0L V6 engine and Automatic transmission.

OAV's AI-powered Price-to-Market analysis rates this vehicle as Unscored due to insufficient comparable data. Based on available similar vehicles in the St. Charles market, the estimated market range is $28,294 to $28,294.

This vehicle has been on the lot for 2 days.

Analysis powered by OAV's patented inventory standardization technology (U.S. Patent No. 12,236,477).

Market context

This listing is part of OAV's broader St. Charles, IL sedans market analysis. OAV compares vehicles using local and regional price-to-market ranges, days-on-lot, comparable count, and demand signals where available.

How this deal is rated

OAV compares this 2018 Audi S4 against similar vehicles currently available in the local and regional market — same make, model, and year range, filtered for comparable mileage. Based on where this listing falls in that comparable set, it is rated:

Great Deal — priced below the typical range for comparable vehicles.
Fair Price — priced within the expected range for comparable vehicles.
Overpriced — priced above the typical range for comparable vehicles.

Listings show OAV's PTM-derived deal quality and live market context. OAV-claimed dealers manage their listing profile and route buyer inquiries directly. Paid OAV partners surface additional verification signals.

How this listing is verified

This vehicle listing was aggregated from a franchise dealer in St. Charles, IL, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN WAUC4AF40JA120486 can be independently verified via the U.S. Department of Transportation's NHTSA VIN decoder, and safety recalls at NHTSA's recall database.

Vehicle attributes (year, make, model, trim, mileage, location) are standardized using OAV's patented methodology (U.S. Patent No. 12,236,477), which normalizes naming conventions and deduplicates cross-listed inventory across the dealership network. Listing data is processed daily; Price-to-Market analysis uses comparable vehicles within the same geographic market.

2018 Audi S4 Market in IL

Comparable Vehicles

Average Price

$28,983

Price Range

$13,725–$36,895

Avg Days on Lot

Based on 14 comparable 2016-2020 Audi S4 listings in IL, the average asking price is $28,983. This listing at $28,294 is $689 below average (2% below market). Comparable prices in IL range from $13,725 to $36,895. Similar vehicles spend an average of 30 days on dealer lots in this market.