I would definitely not say "good luck to them" or be complacent about this kind of pricing. I saw a similar thing happen with vintage watches ten years ago. A small number of dealers realised there was a finite supply and, partly thanks to the internet, an insatiable and growing demand and effectively cornered the market for certain models, pushing their asking prices higher and higher and fixing - that's not too strong a word for it - auction prices until the watches they had in their over stocked safes were worth 10 or in a few cases 100 times more than they had paid for them.
This matters because it effectively forces the ordinary user (like me) out of the market. When my Leica II is actually worth 4,000 euros will I be happy to continue using it? In the past year I have seen asking prices for even common accessories such as green slip on A36 filters leap from 5 - 10 euros to typically 30 or 40. Strangely enough the fact they don't sell does not result in asking prices being lowered
Just to be clear I am not talking about the rarities, the one offs or the true collectors' items which will always be worth a big premium, I am talking about the sort of thing you used to find at camera fairs for a few pounds, for which there is no apparent shortage of supply. There are still many decent buys but when I see the prices some eBay dealers are asking I have to wonder whether their moitive is a realistic expectation that someone will pay it or, more likely, an attempt to shift the price point upwards.
eBay itself is to blame for much of this because a few years ago it decided to turn its back on the collectors and hobbyists who had built into the world's largest online market place and concentrate on retailers/dealers. Instead of auctions starting .99 cents they encouraged BIN prices and the dealers know that even if their doesn't sell the perception of value will have moved ever upward.
I think it's a shame which is why I am usually suspicious of the many blatant attempts to "talk up" prices which have infected vintage watch forums in the recent past. I hope that doesn't happen in the case of vintage cameras but I fear it is inevitable.