Used diesel Audi A6 Avant for sale under £20,000

There are 415 used diesel Audi A6 Avant under £20,000 for sale from UK dealers on AskCar, as of 9 November 2026. Typical asking price £12,500 (the median: half cost less, half cost more). The cheapest is £1,395. AskCar lists 788 used Audi A6 Avant across the UK, from 588 dealerships.

The middle half of the 415 cars are priced between £9,000 and £16,200.

As of 9 November 2026, AskCar lists 584,619 cars and vans from 12,676 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

128 of the 415 cars had their price reduced in the last 14 days to 9 November 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
202022£18,000£15,600 to £19,000
201978£16,600£15,300 to £18,000
201850£14,600£13,000 to £16,400
201751£14,000£11,000 to £15,500
201657£10,400£9,000 to £13,000
201550£11,500£9,800 to £13,500
201426£7,700£7,000 to £9,600
201323£7,600£6,600 to £8,600

Cars for sale now, page 1 of 5

Best value first: the cars priced furthest below their AskCar estimate come first, and those without one come after. The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 767 priced Audi A6 Avant adverts on AskCar as of 9 November 2026.

Each car: year, make, model, engine and trim, power, gearbox, fuel, body, doors, colour; mileage; price and its changes; how the price compares with the AskCar estimate; emissions standard and ULEZ compliance where it holds; MOT; dealer and town; AskCar page.

Cheaper cars like each one, with its price history, are on its AskCar page.

Audi A6 Avant by gearbox, fuel and body

Audi A6 Avant prices by year

Audi A6 Avant by price

Audi A6 Avant near you

Diesel cars and vans under £20,000

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