all the things said above really.

check the inner wings etc, it's becoming more and more difficult to buy a sapphire cossie that hasn't been intermate with another vehicle or solid object at some time in it's life. not the end of the world but just look for poorly patched up motors.

lift the boot carpet up and have a good look under there, saw a fair few with rotten floors and spare wheel wells.

good luck in your search!