Rust around the rear wheel arches and the bottom of the door shuts near the rear wheel.
the engine is bomb proof unless subjected to either, overheating or oil abuse. Make sure there are no signs or overheating and the oil is 5-30 and full.
The gearbox are normally bomb proof.
Be sure to rev it all the way and make sure it pulls cleanly and fully. and every puma should of now had a cam belt. the pulleys are not dowelled so they are pretty easy to fuck up changing the cambelt.