We all know thats a load of rubbish though. RT bought his MY06 for £15k and Lexx is selling his MY07 for £18.5k which I think is more like the real world difference.............
Looking at adverts there is potentially about £3k difference in MY06 to MY07 cars........so as long as you paid about £15k I wouldn't worry, unless as Stew said, you set out to buy a MY07 and thats what you thought you were getting........