[Z-man]

First off - what is your definition of a collector car? That definition varies greatly even among car enthusiasts.

Right now, it seems that the muscle car / American iron segment is still hot. So older Mustangs, Camaros/Firebirds, Vettes and others are holding their own in the collector realm.

I think the Datsun Z's are losing ground - it may have been a flash in the pan in terms of collectability.

My guess to the next big thing - maybe the slightly obscure cars or historically significant cars like the following:
- Toyota GT2000
- Studebaker Avanti
- Porsche Carrera 2.7 RS
- Porsche 924 GTS
- Mercedes 190 EVO
- Mercedes 500 E
- GMC Typhoon / Syclone
- Buick GNX
- Ford RS200
- Lotus Elan

Just thinking out loud...
-Z-man.