Hello! I am wanting to buy a 2006-2008 Grand Prix GT (S/C) next year, I currently drive a 1998 Saturn SL2. I'm looking for something with 135000 miles at the most and in very good shape. How much should I expect to pay for one of these vehicles? I know there is some special care required for the supercharger like changing its oil, how often should I change the supercharger's oil? Are there any known engine/tranny issues with Grand Prix GT's made between 2006-2008? I've read that the 3800 S/C engines are bulletproof and wonderful engines. I'm really excited as I've heard these cars are fun to drive and handle very well!
Any help/advice is appreciated, I don't know a whole lot about these cars.
Thank you for your time,
Austin