2020 Mazda Mazda3 GT Sport prices

There are 24 used 2020 Mazda Mazda3 GT Sport cars for sale from UK dealers on AskCar, as of 10 November 2026. Typical asking price £12,900 (the median: half cost less, half cost more). The cheapest is £9,450. The middle half are priced between £12,200 and £13,900. Median mileage: about 47,000 miles.

Dealers lowered the asking price on more than a quarter of 2020 Mazda Mazda3 GT Sport cars: 8 of the 24 in the 14 days to 10 November 2026.

2020 Mazda Mazda3 GT Sport prices by engine and mileage

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
2.0 petrol£12,900Too few for saleToo few for saleToo few for saleToo few for sale

Typical asking prices are of 2020 Mazda Mazda3 GT Sport cars for sale on 10 November 2026, and are given only where at least 20 cars with a price are for sale.

AskCar lists 1,238 used Mazda Mazda3 across the UK, from 678 dealerships.

As of 10 November 2026, AskCar lists 591,054 cars and vans from 12,888 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2020 Mazda Mazda3 GT Sport cars for sale now, page 1 of 2

This page picks out up to 10 cars in each of these groups: best value, cheapest, lowest mileage, recently reduced and newly advertised. A car in more than one group is listed in full once. The groups pick only from cars with photos and an AskCar estimate, priced at £500 or more and no more than 25% under that estimate. All 24 cars listed here meet these rules. Page 2 lists every other 2020 Mazda Mazda3 GT Sport car, cheapest first.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 1,206 priced Mazda Mazda3 adverts on AskCar as of 10 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2020 Mazda Mazda3 GT Sport.

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. Each car's AskCar page has its full price history and cheaper cars like it.

Best value 2020 Mazda Mazda3 GT Sport: priced furthest below the AskCar estimate

These 10 are priced 0% to 9% under their AskCar estimate. Their asking prices run from £11,490 to £17,995.

Cheapest 2020 Mazda Mazda3 GT Sport: the lowest asking prices

These 10 are priced £9,450 to £12,499. They have covered 49,720 to 100,000 miles.

Lowest-mileage 2020 Mazda Mazda3 GT Sport

These 10 have covered 8,029 to 44,632 miles. Their asking prices run from £12,700 to £17,995.

Recently reduced 2020 Mazda Mazda3 GT Sport: the biggest price reductions in the 14 days to 10 November 2026

The dealer lowered the asking price on each of these 8 in the 14 days to 10 November 2026. Their reductions since AskCar first saw them run from £300 to £2,212.

Newly advertised 2020 Mazda Mazda3 GT Sport: first seen by AskCar in the 7 days to 10 November 2026

These 4 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

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