Again not a lot goes wrong with them.
Common areas of rust are the rear arches and the front "U brace" frame which is a crash aid to help lower the engine in a frontal impact.
Engines, if looked after don't have any common signs of wear. Maybe a bit of piston slap on cold start up, so ensure to hear from cold start.
Calipers can seize the odd piston on the front 4 pots, but not often on the newages.
Ensure that the gearbox oils and diff oils have been changed and not making any funny noises - although they are a more noisey transmission than some are used to.
Clutch, a not too expensive item to replace, but still worth ensuring that the clutch isn't hard, doesn't stink too much doing manoeuvres such as reversing, 3 point turns etc.
Generally, drive a few to get a feel for how they should feel, as on the whole, very reliable cars.