Check the floors thouroughly. Makes sure you dont have major rust issues because it is common. Best thing to do is bring the car to a mechanic you trust and have it fully inspected prior to purchasing. Any reputable seller should not have an issue with getting it checked out. If they do, then its probably not a good purchase and you should look elsewhere.
1996 Jeep Cherokee- Project-- Rusty's 8in long arm, SYE kit, Teraflex driveshaft, Cragar soft 8's 15x10 with 33x12.5 Firestone Destination MT's, Eaton Tru Trac in the front