Well in 2 weeks the 2 rail Stout Auctions is ending. I see a LOT of modern stuff in there. Perhapse a guage as to what items command more, the 1940's- 50's stuff like the Ferdinand Magellon or the 1980's stuff including Overland Amtrak superliners and F40ph's.
Regardless 2 rail or 3 rail, there is a darth of 1970's-1990's loco's [esp non EMD types] and vehicles - M.O.W. service vehicles, Tractor Trailers & 4 door cars.