As of July 2026, CarSearch.Pro's True Value model estimates a typical Audi S4 (B6) is actually worth $11,100 (fair range $9,800 to $12,400). Unlike the median asking price shown above, True Value is anchored to 44 recent confirmed sales, normalized for mileage, and blends auction hammer prices (grossed up for buyer's premium) with real-world asking behavior.
Sellers are currently asking a median of $9,000 — about 19% below what these cars have actually been selling for. Asks sitting below recent sold values can signal softening demand or motivated sellers.
Priced above trend · momentum cooling — but volatile.
As of July 2026, the Audi S4 (B6) market has 116 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $8,999, with the middle 50% of listings priced between $6,495 and $15,900. Audi S4 (B6) prices have decreased 21.4% over the past quarter, from a median sale price of $14,000 to $11,000.
The typical Audi S4 (B6) on the market has 111,000 miles. Listings spend an average of 271 days on market before selling or being removed.
Current Audi S4 (B6) Pricing
A fair price for a Audi S4 (B6) in July 2026 is between $6,495 and $15,900 (25th to 75th percentile). Prices range from $4,800 to $18,991 across 116 active listings.
Price Distribution (116 Active Listings)
Percentile
Price
Meaning
10th
$4,800
Budget / project cars
25th
$6,495
Below average price
Median (50th)
$8,999
Typical market price
75th
$15,900
Above average / premium
90th
$18,991
Top tier / low miles / rare spec
The average asking price is $10,909, which is higher than the median, indicating that high-priced outliers (rare specifications, very low mileage, or concours-quality examples) pull the average up.
Price by Mileage
Mileage Range
Listings
Median Price
Under 10,000 mi
4
$29,981
25,000 - 50,000 mi
10
$17,999
50,000 - 100,000 mi
26
$10,995
100,000 - 150,000 mi
54
$6,999
Over 150,000 mi
14
$5,884
Audi S4 (B6) Price Trends
Audi S4 (B6) prices have decreased 21.4% over the past quarter. In 2026-Q2, the median sale price was $11,000 across 5 sales, down from $14,000 in 2026-Q1.
On a year-over-year basis, Audi S4 (B6) prices are down 17.0% ($11,000 vs. $13,250 a year ago).
Audi S4 (B6) Quarterly Sale Prices (Historical)
Quarter
Sales
Median Price
Average Price
2024-Q3
8
$15,500
$13,635
2024-Q4
5
$8,000
$13,600
2025-Q1
9
$18,250
$17,968
2025-Q2
6
$13,250
$11,665
2025-Q3
12
$19,888
$17,875
2025-Q4
21
$10,750
$13,836
2026-Q1
8
$14,000
$14,619
2026-Q2
5
$11,000
$9,960
Best Value Audi S4 (B6) by Model Year
The 2005 Audi S4 (B6) offers the best value with a median price of $7,000 across 67 listings. The most expensive model year is 2004 at a median of $14,661.
Median Price by Model Year
Year
Listings
Median Price
Min
Max
2003
1
$9,500
$9,500
$9,500
2004
48
$14,661
$2,500
$32,981
2005
67
$7,000
$2,500
$32,800
How Mileage Affects Audi S4 (B6) Value
Most price guides assume value falls linearly with mileage. It doesn't. CarSearch.Pro learns the actual price-vs-mileage curve for the Audi S4 (B6) from confirmed sales, referenced to a typical example at about 91,450 miles:
Odometer (approx.)
Value Multiplier
Implied Value
1,118 mi
1.44x
$15,973
4,330 mi
1.24x
$13,751
10,607 mi
1.10x
$12,261
21,833 mi
1.08x
$11,988
39,991 mi
1.17x
$13,009
62,012 mi
0.89x
$9,906
97,563 mi
0.94x
$10,384
146,097 mi
0.72x
$7,941
300,000 mi
0.52x
$5,769
Low-mileage examples carry a real premium in this market: around 1,118 miles, cars trade at roughly 1.44x the reference value. At the other end, 300,000-mile examples trade at about 0.52x. Implied values here are anchored to this market's True Value.
Audi S4 (B6) Price Forecast
Horizon
Direction
Probability
Regime
Past Accuracy
6 months
↓ DOWN
55%
volatile
53% over 53 tests
12 months
↓ DOWN
56%
volatile
55% over 47 tests
24 months
↓ DOWN
58%
volatile
74% over 35 tests
These are probabilistic direction calls, not price targets. The "Past Accuracy" column is this model's real walk-forward record on the Audi S4 (B6) — every month we re-run the forecast as if we only knew what was knowable then, and grade it against what actually happened. We publish the hit rate either way. Full methodology & track record →
Where to Buy a Audi S4 (B6)
The highest concentration of Audi S4 (B6) listings is in CA with 21 active listings, followed by IL (14), WA (11), CO (8), TX (6).
Regional pricing varies significantly. The lowest median price is in CO at $5,884, while TN has the highest at $29,981. Buyers willing to travel or arrange transport may find savings of $24,097.
Top States by Inventory
State
Listings
Median Price
CA
21
$9,975
IL
14
$10,000
WA
11
$12,991
CO
8
$5,884
TX
6
$6,495
FL
6
$6,995
KS
5
$17,999
MA
4
$9,986
OK
4
$6,900
NE
3
$17,900
Audi S4 (B6) Market Velocity
Audi S4 (B6) listings spend an average of 271 days on market. This is a slow-moving market. Listings tend to sit for extended periods, giving buyers significant negotiating power. Sellers should be realistic on pricing and patient.
The median time on market is 148 days. The lower median suggests most cars sell relatively quickly, while a smaller number of overpriced listings drag up the average.
Audi S4 (B6) Buyer's Guide Summary
Fair price range: $6,495 to $15,900. The median is $8,999. Anything below $6,495 is a strong value; above $15,900 should be premium condition, low miles, or a desirable specification.
Trending down: Audi S4 (B6) prices have dropped 21.4% recently. Patient buyers may benefit from waiting, but desirable examples still sell quickly.
Best value year: The 2005 model year has the lowest median price at $7,000, making it the most accessible entry point into Audi S4 (B6) ownership.
Negotiate: With an average of 271 days on market, sellers are often willing to negotiate. Listings over 60 days old are especially open to offers.