I agree that the new ford gt will be a future collectible. I believe they already are holding their purchase value.
Vipers also seem to hold value very well. Probably too many built to reach super colletibility though.
A Dino is from 140 to 250K now. 100K might buy a basket case.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.

[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.