the most important thing is,....... use ur common sense, check,shocks, with the bounce check,. check oil filler cap for white sludge residue, (which would indicate head gasket on its way) oil leaks, water leaks, keep car running on idle for 10/15mins 2 see if overheats, check for black/blue smoke from exhaust, indicating worn and tired engine thats burning oil,. check for crash damage, or respray, (wings,doors bootlid).. check all electrics work, i.e. windows/mirrors/roof/air con. etc etc (as electrics can prove 2 be costly 2 put right!!,. basically..... rule by ur head not ur heart !!!!!!!!!!!!