If I win an auction on ebay, I'm a clever shopper who scored a bargain, and if I lose an auction on ebay, it's because of the foolish blind trend-followers who are overpaying for antiquated cameras. Pretty simple.
There is a limited supply of old film cameras, but the limit to the supply is very large except for some rare, collectible, old items, or things that were very expensive when new. This year's problem is that the supply chain is constricted: the route from people's hoards through ebay merchants or camera stores to your hot hands is often blocked as other people have suggested above. The market has less liquidity.
It's just stuff. I don't need to worry about if people are overpaying for Pentax K1000's. There are more important problems.