2018 MINI Convertible prices

There are 89 used 2018 MINI Convertible cars for sale from UK dealers on AskCar, as of 2 November 2026. Typical asking price £10,800 (the median: half cost less, half cost more). The cheapest is £5,995. The middle half are priced between £9,500 and £12,500. Median mileage: about 43,000 miles.

Dealers lowered the asking price on more than a third of 2018 MINI Convertible cars: 38 of the 89 in the 14 days to 2 November 2026.

2018 MINI Convertible prices by engine and mileage

A 2018 MINI Convertible 2.0 petrol car typically costs £13,700, against £10,000 for the 1.5 petrol, as of 2 November 2026.

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
1.5 petrol£10,000Too few for saleToo few for sale£9,800Too few for sale
2.0 petrol£13,700Too few for saleToo few for saleToo few for saleToo few for sale

2018 MINI Convertible prices by trim

TrimTypical asking price, 2018 cars
Cooper£10,000
Cooper SToo few for sale
John Cooper WorksToo few for sale
Cooper ClassicToo few for sale
Cooper ExclusiveToo few for sale
Cooper S SportToo few for sale
Cooper S ClassicToo few for sale

Only 13 of the 2018 MINI Convertible cars for sale are Cooper S, too few to give a typical asking price.

Only 8 of the 2018 MINI Convertible cars for sale are John Cooper Works, too few to give a typical asking price.

Only 7 of the 2018 MINI Convertible cars for sale are Cooper Classic, too few to give a typical asking price.

Only 1 of the 2018 MINI Convertible cars for sale are Cooper Exclusive, too few to give a typical asking price.

Only 1 of the 2018 MINI Convertible cars for sale are Cooper S Sport, too few to give a typical asking price.

Only 1 of the 2018 MINI Convertible cars for sale are Cooper S Classic, too few to give a typical asking price.

Typical asking prices are of 2018 MINI Convertible cars for sale on 2 November 2026, and are given only where at least 20 cars with a price are for sale.

2018 MINI Convertible against other years

A 2017 MINI Convertible car has a typical asking price of £10,000 and a 2019 one £12,200, as of 2 November 2026.

AskCar lists 1,068 used MINI Convertible across the UK, from 694 dealerships.

As of 2 November 2026, AskCar lists 586,270 cars and vans from 12,920 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2018 MINI Convertible 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. 84 of the 86 cars listed here meet these rules. Page 2 lists every other 2018 MINI Convertible car, cheapest first, including the 2 the groups do not pick from.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 1,035 priced MINI Convertible adverts on AskCar as of 2 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2018 MINI Convertible.

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.

This list leaves out 3 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

Best value 2018 MINI Convertible: priced furthest below the AskCar estimate

These 10 are priced 6% to 13% under their AskCar estimate. Their asking prices run from £5,995 to £15,255.

Cheapest 2018 MINI Convertible: the lowest asking prices

These 10 are priced £5,995 to £8,995. They have covered 45,000 to 96,552 miles.

Lowest-mileage 2018 MINI Convertible

These 10 have covered 1,762 to 23,500 miles. Their asking prices run from £11,299 to £19,750.

Recently reduced 2018 MINI Convertible: the biggest price reductions in the 14 days to 2 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 2 November 2026. Their reductions since AskCar first saw them run from £1,000 to £3,300.

Newly advertised 2018 MINI Convertible: first seen by AskCar in the 7 days to 2 November 2026

These 9 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

MINI Convertible by gearbox, fuel and body

MINI Convertible prices by year

MINI Convertible by trim

2018 MINI Convertible by trim

MINI Convertible by price

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