Live US dealer listings Median-priced benchmark Updated 2026-10-16
Market price · Used 2018 Audi A6 227 listings tracked

Used 2018 Audi A6 Price in the US

A used 2018 Audi A6 in the US typically lists for $14,232–$19,034, with a median asking price of $16,600 across 227 active US dealer listings (as of 2026-10-16). The cheapest one listed right now is $7,999, a 2018 20 Tfsi Premium in Fredericksburg, VA — below 95% of the market, so expect high mileage, a base trim or a branded title — check the vehicle history.

Used 2018 Audi A6 · asking prices227 listings
$10k$26k
Typical range
$14,232 – $19,034
Median
$16,600
Cheapest 5%
under $10,813
Cheapest listed now
$7,999

Browse by model year

typical price per year
More years (18)

Cheapest 10 listed right now

ranked by price
  1. 2018 Audi A6
    $7,999
    2018 Audi A6 20 Tfsi Premium
    213,657 mi · Fredericksburg, VA · American Auto Mall
    View listing →
  2. 2018 Audi A6
    $8,793
    2018 Audi A6 Quattro Sport Premium
    144,872 mi · Kokomo, IN · Auto Kings
    View listing →
  3. 2018 Audi A6
    $9,749
    2018 Audi A6 Sport Premium
    107,100 mi · Denver, CO · Auto King
    View listing →
  4. 2018 Audi A6
    $9,750
    2018 Audi A6 Quattro Sport Premium
    161,844 mi · San Antonio, TX · Challenge Auto Center
    View listing →
  5. 2018 Audi A6
    $9,950
    2018 Audi A6 Quattro Premium Plus
    134,481 mi · Princeton, NJ · Audi Princeton
    View listing →
  6. 2018 Audi A6
    $9,993
    2018 Audi A6 Quattro Premium Plus
    142,290 mi · Somerville, NJ · Yosh Motors of Somerville
    View listing →
  7. $9,994
    2018 Audi A6 Quattro Premium Plus
    144,208 mi · Sterling, VA · Subaru of Sterling
    View listing →
  8. 2018 Audi A6
    $9,998
    2018 Audi A6 Quattro Sport Premium
    124,956 mi · Arlington Heights, IL · Arlington Imports
    View listing →
  9. 2018 Audi A6
    $10,080
    2018 Audi A6 Premium Plus
    129,530 mi · Sacramento, CA · Z Auto
    View listing →
  10. 2018 Audi A6
    $10,500
    2018 Audi A6 Sport Premium
    116,907 mi · Jacksonville, FL · BlackSea Auto
    View listing →

These are the bottom of the market, not the going rate — every one is priced below 95% of active listings. A typical used 2018 Audi A6 asks $14,232–$19,034. Cars this far under: expect high mileage, a base trim or a branded title — check the vehicle history.

FAQ

How much does a used 2018 Audi A6 cost?

A used 2018 Audi A6 in the US typically lists for $14,232 to $19,034, with a median asking price of $16,600 across 227 active US dealer listings. Nine in ten are priced between $10,813 and $24,990 (as of 2026-10-16, source: UnderMarket Cars).

Is $17,000 a good price for a used 2018 Audi A6?

That sits at about the market median ($16,600) for a used 2018 Audi A6. Under $14,232 puts you in the cheapest quarter of active US listings and under $10,813 in the cheapest 5%; above $24,990 is the priciest 5% (as of 2026-10-16).

What is the cheapest used 2018 Audi A6 for sale right now?

$7,999 — a 2018 Audi A6 20 Tfsi Premium in Fredericksburg, VA, $8,601 under the median (as of 2026-10-16).

Are these MSRP or real asking prices?

Real asking prices from active US dealer listings, deduplicated by VIN — not manufacturer MSRP. They already reflect dealer discounts, and they exclude tax, title, registration and dealer fees.

How often are prices updated?

The listing data behind UnderMarket Cars is rebuilt from live US dealer inventory every few hours, and this used 2018 Audi A6 page is regenerated from it when it is requested. The figures on this page are from 2026-10-16.

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Prices updated 2026-10-16. Data covers active dealer listings across the USA.