i havent compared fully but a quick search on autotrader bought up a 25k miles equivalent for 15k..... so i would say maybe lower your price to 16.5k if you want to drum up any interest but even then there are no guarantees
25,000 miles, 3. 2L M-Powered, 25,000 Miles, FSH (BMW), Recently serviced (insp1). Very rare spec includes: Factory Fitted Sat Nav, Cruise Control, Heated Leather Memory Seats, BMW Professional Fibre Optic CD Sound System with Bluetooth. MOT November 2011, 4 New Tyres. Mint condition for it's year! New baby forces VERY reluctant sale! Will be traded-in in 12 days. £15,000 No offers