leaking from pilot bushing on transmission housing.broken rear springs, droplinks knocking, make sure the turbo kicks in at roughly 1200-1500rpm and pulls smoothly no excess smoke from exhaust or a rattly noise could mean broken cats, excessive corrosion on wheels, and just general wear and tear items check all the spare wheel and kit that all electrics work and lights i.e indicator strips arent full of water.e.t.c just common sense.