The #1 thing to look for is rust. Most commonly under the battery in the engine compartment (aka the hell hole), under the rocker panels in the longitudinals & on the floors (front & rear trunk, passenger compartment). The only thing that can't rust is the roof, because it's made out of fiberglass. You have to ask yourself what you want a 914 for- driving, modifying, concours/showing, etc... This will determine a lot regarding your budget. Good luck & be patient- you'll save a lot if you are.