I have a two and a half year old BMW M3 and I drive it a lot because of my job. I plan to change it in 2013 and imagine it will have done about 80,00 miles by then. I need to plan this carefully because I would be wanting to get a one-year-old AUC M3 (it'll be the new version 3-litre with turbo) and I want to know how much you think mine is likely to be worth at that point. It will be almost five years old then. It is a coupe, manual, Interlagos blue, leather interior, satellite navigation, heated seats, iDrive, CD player, light and rain detection.