I'd agree with Crypt. My friend had one, and it seemed like he was always having "annoyance" problems. An odd one is that the headlights fall out. Like anything, I'm sure there are good and bad ones. Good luck!
If it's a GTP and not beat on, then I'd say go for it.
Just have to watch the intake manifold gaskets leaking. That goes for all the motors for them...3100, 3800, and the supercharged 3800.
Step daughter has a 2000 GTP and I run a 97 GT on the 1/4 mile paved oval. 3800's are good engines.
Stay as far away as possible.....I like the GTP's...but holy problems...more issues with the car itself rather than the engine, but you still have the intake issues, and the plastic intake that cracks and leaks coolant into the cylinders on the 3800.