I am buying a Z28 regardless of price for two reasons. It serves my business interest, but equally or maybe more important -- I want one. My guess is that the GT500 and the Z28 have enough buyers lined up who to a degree look past the price because they just want it.
In the computer or consumer electronics world the price of the latest and greatest contains a HUGE premium and then decreases. I have yet to see that in the automotive world.