Here's the golden rule about collector cars.....
If they didn't want it then - then they wont want it now....
Everybody wants a 69 Roadrunner....
Nobody wants a 69 Pacer.....
Everybody wants a 20 year old Corvette.....
Nobody wants a 20 year old pontiac Sunbird....
See the pattern here?.........
Of course lots of folks will want a Pontiac GTO.....
Nobody wants a Pontiac station wagon.........
Stick with collecting the Pontiac's everybody wanted.... Firebirds, GTO's and similar models.... Those will always get the money!