like said cars are worth what folk are willing to pay, mine is on there at the moment ( http://www.pistonheads.com/sales/191775.htm ) and i priced it to what i think it would cost to replace it(if possible) every one thinks there car is mint and only the honest straight examples are worth good money. the way i look at it is:

IF THE GUY SELLING THIS CAR GETS £25k FOR IT, TURN ROUND TO HIM AND SAY GO AND BUY ANOTHER EXACTLY THE SAME AS IT. EVEN WITH 25K IN HIS POCKET HE WILL FIND IT HARD TO REPLACE.