I bought my Grand Prix used from the original owner. It was loaded with sunroof and "heads-up" display on the windshield. I loved this car. It had 50,000 miles on it when I purchased it and it had 130K when I sold it. I never had any engine problems except that the intake manifold gasket was leaking due to a known issue caused by GM's Dexcool antifreeze. Coolant leaks are a common problem on GM models from that time period. It was going to cost me about $700 to have it repaired and the car is only valued at about $1500, so I decided to trade it in on a new vehicle. The car handles well and the 3.1 liter engine delivers plenty of horsepower.
I bought the car brand new and drove it for 4yrs and traded it with 50,000mi. Required nothing but regular maintenance. I loved the sporty look and feel of the car and was still able to cart the kids around! Only flaw was the winter handling, it wasn't the best in the snow. I traded it in for an SUV and lost that exciting feel when driving.
My car currently has 99K on it and has been a jewel of a car. The only downfall was an intake gasket and my transmission at 98K went. However I run my car very hard and it has handled it extremely well. I'd reccommend it to anyone.
I have 110,000 miles on my Pontiac GP SE Coupe. I purchased it new in '96 and the car has essnetially been trouble- free. However, it drinks more oil after about 60K. The car runs smooth and quiet, although it could use a bit more power (I have the 3.1 liter engine). I bought the car because of the style and the price. It looks a lot sportier than it really is.
My freinds like it more than I do. my little 3100 SFI puts out enough HP to get me where i want to go in style, but it doesnt quite feel like a shuttle launch. My evil plan is to drop a 3800 S/C L67 in this car. The 3200 lbs curb weight is light for this type of car (compared to a t-bird anywhoo) This is especially a great car if you love two-doors but hate feeling like you and your freinds are packed in like sardines.