I must admit to thinking the same myself only the other day. I got divorced 5 years ago and as a result ended up selling 2/3rds of my collection. I'd promised myself that once things got sorted I'd get some/all of them back. I sold 3/4rs of them on ebay and got what I thought, were a few decent prices for them. However, I look now, and either they aren't there (fair enough, I expect that might be the case) or they are just ridiculous prices. Mostly Buy It Now or starting prices nearly twice as much as I got for mine.
Alder Ray would be the prime example, I got £30 for a mint copy, the only one I can find now is $199.99 (£130 odd depending on the state of the pound). Similar with Teddy Randazzo, sold a mint dj for £65 and the only one available is $175.00 (nearly £120).
Most of the prices appear to be prohibitive, as if they maybe don't want to sell. I can sympathise a little with that as I know how it feels to let a Timi Yuro go, regardless of price. Sometimes though, life's priorities change for some of us.
Having browsed through a few sellers items, particularly those that have high BIN prices, it reminds me of looking through a gallery. All wonderfully presented, one in particular that you just drool over. Perhaps that's it, maybe ebay's become a showroom for those that have these wonderous collections.
Another thought, if you have a shop, Buy It Now shop items cost a lot less to put up.
Maybe I'll stick to Refosoul and my MP3's.