Whoa, NZ! Nice list!
Where are you located, 70sum? In Massachusetts there is a place called High Street Auto, I think in Wareham. They advertise in Mopar Collectors Guide in the Challenger section. I believe they do mostly E-bodies. I've never been there but New England winters are not kind to old muscle cars.
The obvious thing to say is try to find a car that is in as best a shape that you can afford. The more complete, the better. Like NZ said, most things are reasonably easy to find. Have fun.
