As of August 2026, CarSearch.Pro's True Value model estimates a typical Audi S4 (B6) is actually worth $10,300 (fair range $9,100 to $11,600). Unlike the median asking price shown above, True Value is anchored to 42 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 $7,600 — about 26% 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 August 2026, the Audi S4 (B6) market has 226 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $7,000, with the middle 50% of listings priced between $5,350 and $10,111. Audi S4 (B6) prices have increased 1.0% over the past quarter, from a median sale price of $14,400 to $14,550.
The typical Audi S4 (B6) on the market has 108,000 miles. Listings spend an average of 259 days on market before selling or being removed.
Current Audi S4 (B6) Pricing
A fair price for a Audi S4 (B6) in August 2026 is between $5,350 and $10,111 (25th to 75th percentile). Prices range from $3,750 to $17,900 across 226 active listings.
Price Distribution (226 Active Listings)
Percentile
Price
Meaning
10th
$3,750
Budget / project cars
25th
$5,350
Below average price
Median (50th)
$7,000
Typical market price
75th
$10,111
Above average / premium
90th
$17,900
Top tier / low miles / rare spec
The average asking price is $8,768, 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
25,000 - 50,000 mi
11
$17,900
50,000 - 100,000 mi
70
$9,995
100,000 - 150,000 mi
79
$6,500
Over 150,000 mi
42
$5,500
Audi S4 (B6) Price Trends
Audi S4 (B6) prices have increased 1.0% over the past quarter. In 2026-Q3, the median sale price was $14,550 across 5 sales, up from $14,400 in 2026-Q2.
On a year-over-year basis, Audi S4 (B6) prices are down 26.8% ($14,550 vs. $19,888 a year ago).
Audi S4 (B6) Quarterly Sale Prices (Historical)
Quarter
Sales
Median Price
Average Price
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
18
$10,750
$13,589
2026-Q1
10
$12,990
$13,992
2026-Q2
7
$14,400
$12,541
2026-Q3
5
$14,550
$16,302
Best Value Audi S4 (B6) by Model Year
The 2005 Audi S4 (B6) offers the best value with a median price of $6,995 across 126 listings. The most expensive model year is 2004 at a median of $7,900.
Median Price by Model Year
Year
Listings
Median Price
Min
Max
2003
2
$7,498
$7,000
$7,498
2004
98
$7,900
$2,500
$18,386
2005
126
$6,995
$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 90,900 miles:
Odometer (approx.)
Value Multiplier
Implied Value
1,118 mi
1.46x
$15,027
4,330 mi
1.25x
$12,914
10,607 mi
1.11x
$11,412
21,833 mi
1.09x
$11,233
40,828 mi
1.16x
$11,918
62,259 mi
0.98x
$10,079
96,610 mi
0.92x
$9,508
147,508 mi
0.73x
$7,531
300,000 mi
0.58x
$5,982
Low-mileage examples carry a real premium in this market: around 1,118 miles, cars trade at roughly 1.46x the reference value. At the other end, 300,000-mile examples trade at about 0.58x. 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
54%
volatile
56% over 54 tests
12 months
↓ DOWN
56%
volatile
56% over 48 tests
24 months
↓ DOWN
57%
volatile
75% over 36 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 33 active listings, followed by WA (19), PA (15), IL (15), CO (14).
Regional pricing varies significantly. The lowest median price is in MI at $5,000, while KS has the highest at $17,999. Buyers willing to travel or arrange transport may find savings of $12,999.
Top States by Inventory
State
Listings
Median Price
CA
33
$8,999
WA
19
$17,000
PA
15
$7,000
IL
15
$7,900
CO
14
$7,500
FL
14
$7,500
NY
12
$5,350
TX
12
$6,495
NJ
11
$5,000
MA
8
$9,000
Audi S4 (B6) Market Velocity
Audi S4 (B6) listings spend an average of 259 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 143 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: $5,350 to $10,111. The median is $7,000. Anything below $5,350 is a strong value; above $10,111 should be premium condition, low miles, or a desirable specification.
Prices stable: Audi S4 (B6) values have been relatively flat. There is no urgency to time the market.
Best value year: The 2005 model year has the lowest median price at $6,995, making it the most accessible entry point into Audi S4 (B6) ownership.
Negotiate: With an average of 259 days on market, sellers are often willing to negotiate. Listings over 60 days old are especially open to offers.