For comparison, I picked up a 2001 GTP recently, very clean, 120K miles, for $3000. That's Canadian $ but lately that's been about even with the US$. A friend got a Bonny SSEi about 6 months ago, same year, similar mileage for around the same price (can't remember exactly off hand)

I'd pass on that one unless he's willing to come down. A lot! Keep looking, I hope you do find a GP, they are a hell of a nice car!