The cameras were pretty simple back then, huh. This guy (seller) must have some $$. He has a tremendous amount of high-priced vintage photography. I don't know if he does it for a living, as he prices his stuff astronomically high. I think he just likes showing it off and if it sells at a crazy price...then fine.
I always dreamed about going from paper show to paper show and buying up vintage photos / RPPC. But it is a chore. If rich, I'd buy online and save the travel hassle.