Absolutely! Look at postwar train values. Unless a piece is like new with a crisp box it is worth far less then in the past. Folks can get the same piece with up to date technology rather then get a post war VG or even E condition item
Years ago, at one of my auctions, we were selling a number of very nice MTH engines. I noticed that the selling prices were much lower than we had gotten at previous auctions. I asked one of the buyers why that was. He told me "They just announced PS2" So, that quickly, the price dropped 25-40%!
Al