Market overview: Which Mini models are currently the most popular on the used car market? AutoUncle has analysed 926 used Mini cars that are currently for sale at 44 dealerships. The three most popular Mini models as used cars are: Cooper Clubman, Cooper S Clubman, John Cooper Works Clubman. Prices start at around £3,695, and the average price for a Mini on today’s used car market is £14,440.