rust in floor boards,
light reflectors/covers
door seals,
take it for a test drive and
see if there is noise in the running gear,
rust on dash (leaky windshield seal)

look at oil color. black means someone
hasn't been maintaining oil.
look at distributor cap and rotor. check for
wear.
make sure all tin is in engine compartment,
on bottom side of engine.
does rear end ride low?
interior panels, window roller handles,
interior lights, rubber floor mats,

Jen