ALWAYS have a vehicle checked out by a competent mechanic & shop with a very good reputation! I didn't and ended up with a Jeep GC with lots of problems. It probably needs an overhaul but my wife thinks I'd be better off with a newer Jeep, probably a Wrangler Unlimited. If I had specified in the buying contract "Subject to good mechanical report" or words to that effect, I probably would not have bought the unit I bought. The lesson for me is to keep my emotions out of it and never, never, never buy a vehicle unless it has a good or better recommendation from a reliable 3rd party mechanic. Car dealers can be reliable, but many only want to sell the vehicle for the highest price they can get. If they try to keep you in the store after you have told them you are leaving - RUN LIKE HELL!
2000 Jeep Grand Cherokee WJ with 169,000 miles. Stock, as far as I can tell, but "Stupid" is supposed to have a 2" lift. Bought in October 2012; parts replaced: upper rear control arm, rear ball joint, front tie rods (Moog), rear door actuator, replaced all tires with 245/65R17.