Just wanted to point out that you could add Supra to this mix since Toyota was putting heavy incentives on the cars and lowering production quantities all through its manufacturing run. It never caught on. Guys that purchase Corvettes, Porsches and Vipers don't really consider a Supra a high end performance car. The reason the Supras out there sell for a fortune is because there are very few available in the market. They have a cult following; so doe the Z32, but they are abundant in the market and still cheaper to modify due to more aftermarket support.
Too bad because the Supra is a pretty nice car, but the price of admission for a used one is ridiculously high. I think most guys on this board would see a lot more bang for the buck in something else.