Used Mercedes-Benz GLB 7-seater for sale under £20,000

There are 61 used Mercedes-Benz GLB 7-seater under £20,000 for sale from UK dealers on AskCar, as of 1 November 2026. Typical asking price £19,000 (the median: half cost less, half cost more). The cheapest is £15,480. AskCar lists 869 used Mercedes-Benz GLB across the UK, from 392 dealerships.

The middle half of the 61 cars are priced between £17,800 and £20,000.

As of 1 November 2026, AskCar lists 578,994 cars and vans from 12,654 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

22 of the 61 cars had their price reduced in the last 14 days to 1 November 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
202223£19,000£17,900 to £19,600
202123£18,800£17,800 to £20,000

Cars for sale now

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 862 priced Mercedes-Benz GLB adverts on AskCar as of 1 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.

Mercedes-Benz GLB by gearbox, fuel and body

Mercedes-Benz GLB prices by year

Mercedes-Benz GLB by price

7-seater cars under £20,000

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