In every hobby I'm involved in, there have been a lot of these can-you-believe-what-that-sold-for threads lately, and most are based on ebay. The consensus seems to be that ebay is a poor gauge for the market because:
1. Some of the prices are asking prices, not selling prices. Ebay is loaded with people who think everything in their attic is made of solid gold. Craigslist is even worse.
2. Bidding wars are common between people with more money (or testosterone) than brains, and this often results in exorbitant selling prices for common items. Once that happens, other sellers start setting crazy asking prices on their common items.
3. Shills are not unheard of. The savvy ebay guys can look at the bidding on an item and spot whether shills were involved, but I don't know how to do it.
4. The lack of in-person meets may be a factor, but how much is that offset by a lot of people undergoing economic uncertainty and becoming more reluctant to spend as they used to?