This should get a laugh from some of the Firebird Pros:

Ah, I see the price is going up......
Offer him 2K cash and offer to drag it home, acting like you are wasting your money but feel sorry for HIM. Shake your head alot. Make a few fake phone calls off the cellphone to buddy experts. Pretend to call the wife and act as if she is begging to talk you out of it, all this within his earshot. A good wife will actually participate in this ploy as mine did. I just ran a simple Tag check on the numbers you posted, as most others probably did, unless the frame is warped or theres bloody body parts in the trunk I think you should go for it!! Buy, BUY!
PS - I wound up spending twice as much as I had intended...but I love my Firebird!