Used automatic MG MG3 for sale under £20,000

There are 839 used automatic MG MG3 under £20,000 for sale from UK dealers on AskCar, as of 7 November 2026. Typical asking price £16,000 (the median: half cost less, half cost more). The cheapest is £9,499. AskCar lists 1,912 used MG MG3 across the UK, from 669 dealerships.

The middle half of the 839 cars are priced between £15,000 and £17,000.

As of 7 November 2026, AskCar lists 601,018 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

297 of the 839 cars had their price reduced in the last 14 days to 7 November 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
2026446£16,800£16,000 to £18,000
2025257£15,200£14,800 to £15,800
2024133£14,200£13,800 to £14,700

Cars for sale now, page 8 of 9

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 1,842 priced MG MG3 adverts on AskCar as of 7 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.

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