[The DaveR]

I like to consider myself a pretty astute clothing shopper and I've often found tremendous deals for new clothes on ebay. If you know your measurements rather than just size and have specific ideas about what you'd like to find (looking for one specific thing is often just asking to be frustrated) you can routinely save a tidy sum. On the other hand, I've also done fairly poorly--albeit years ago--finding used, out of print, books there. Other sites like Alibris and increasingly Amazon are much easier to use. And I've never used it for sourcing older wine preferring the interface on Winebid.

I'm curious what other kinds of things people routinely find on ebay and whether you're finding things that are rare or just efficiently price shopping.