As of October 2026, CarSearch.Pro's True Value model estimates a typical Audi S4 (B6) is actually worth $9,900 (fair range $8,700 to $11,000). 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 9% below what these cars have actually been selling for. Asks sitting below recent sold values can signal softening demand or motivated sellers.
Undervalued vs trend · momentum cooling — but volatile.
As of October 2026, the Audi S4 (B6) market has 134 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $9,000, with the middle 50% of listings priced between $6,000 and $13,472.
The typical Audi S4 (B6) on the market has 117,057 miles.
Current Audi S4 (B6) Pricing
A fair price for a Audi S4 (B6) in October 2026 is between $6,000 and $13,472 (25th to 75th percentile). Prices range from $4,900 to $17,991 across 134 active listings.
Price Distribution (134 Active Listings)
Percentile
Price
Meaning
10th
$4,900
Budget / project cars
25th
$6,000
Below average price
Median (50th)
$9,000
Typical market price
75th
$13,472
Above average / premium
90th
$17,991
Top tier / low miles / rare spec
The average asking price is $10,048, 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
13
$17,999
50,000 - 100,000 mi
40
$10,220
100,000 - 150,000 mi
43
$6,200
Over 150,000 mi
31
$6,800
Best Value Audi S4 (B6) by Model Year
The 2005 Audi S4 (B6) offers the best value with a median price of $8,796 across 73 listings. The most expensive model year is 2004 at a median of $9,500.
Median Price by Model Year
Year
Listings
Median Price
Min
Max
2004
61
$9,500
$2,500
$25,000
2005
73
$8,796
$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 87,200 miles:
Odometer (approx.)
Value Multiplier
Implied Value
1,118 mi
1.45x
$14,366
4,330 mi
1.24x
$12,264
10,607 mi
1.11x
$11,035
21,833 mi
1.10x
$10,850
40,828 mi
1.16x
$11,515
63,057 mi
1.07x
$10,544
96,286 mi
0.89x
$8,854
145,917 mi
0.75x
$7,383
300,000 mi
0.58x
$5,713
Low-mileage examples carry a real premium in this market: around 1,118 miles, cars trade at roughly 1.45x 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
→ FLAT
50%
volatile
63% over 56 tests
12 months
↓ DOWN
57%
volatile
62% over 50 tests
24 months
↓ DOWN
59%
volatile
71% over 38 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 →
Audi S4 (B6) Buyer's Guide Summary
Fair price range: $6,000 to $13,472. The median is $9,000. Anything below $6,000 is a strong value; above $13,472 should be premium condition, low miles, or a desirable specification.
Best value year: The 2005 model year has the lowest median price at $8,796, making it the most accessible entry point into Audi S4 (B6) ownership.