My favorite one was about seven or eight years ago. Some popular retail computer site, I can't remember the url now something-online.com. It was bought out by egghead or someone similar. So they went on this huge liquidation sale. They used an online auction to unload everything. But there wasn't enough people who knew about it. So all sorts of software was going for $1 or $2, things that should have been a lot more. I ended up buying some server backup software similar to ghost for $10. When I received it, I discovered a few things. First, it was novell only, so I couldn't use it. Second, it normally went for about $1000 retail (i didn't know). Third, there was a $200 rebate in it. I ended up getting the rebate.
brian