Market overview: Which Lexus models are currently the most popular on the used car market? AutoUncle has analysed 250 used Lexus cars that are currently for sale at 46 dealerships. The three most popular Lexus models as used cars are: IS300h, IS250, IS200. Prices start at around £1,590, and the average price for a Lexus on today’s used car market is £8,090.