If you are an eBay seller, you may want to take note of this. I search daily for a certain calc. On Saturday I did the search, and at least two new auctions came up, but they weren't new. They were several days old. Point being, that the eBay search is missing some of the auctions. I had wondered at some of the low prices I had been seeing in the closed auctions lately, and this helps explain it.
I contacted eBay about the problem, expecting their usual "you don't know what you're doing type of canned answer," but actually got a real response. They said it is an intermittant problem that they are working on. So anyway, consider this if you're about to list something, or if you've recently received a very low final bid for your auctions. I don't know if there is any recourse for this, or not. Maybe you can refuse to make the sale, because of technical difficulties in the eBay system, or whatever. I guess you would have to discuss that with eBay and/or the high bidder.