The answer to those high prices is scarcity, at this point, 60 or 70 or 80 years out, how many mint/ln units do you really see? We are talking original units, units that have been restored generally fetch lower prices in almost anything I can think of. The Voldemort Jr auction site is a weird place, because sometimes it really is hard to tell what things are going for, I wouldn't be surprised if to raise prices people with stuff up get friends to put in bids on stuff, and if they win they privately wash it, if not they get higher prices. High prices also can be about one person's desire to have something, where the market value and what they are willing to pay are two different things, where they are willing to pay more (in a sense, a lot of items that are auction and have a buy it now as well are like that).
I have heard some shall we say optimistic people telling me this means that their post war collection is going to be worth a lot when it comes time to sell, and it is just that, optimism (maybe taken to a big extreme.....), ordinary stuff is just not going to command large prices, it will be the scarce stuff that is going to increase in price. Kind of like that baseball card you once used in the spokes of the wheels of your bike, and then realizing what it could be work if you sealed it in plastic and put it away
(On the other hand, trains to me are like what the late "Spaceman" Bill Lee said about baseball cards and collecting: "Man, baseball cards are for putting in the spokes of your bike and going like a bat out of h***, that is the best"
