The rules as of now are that you have to include some kind of OEM equipment if you are selling operating systems that were included with PC software bundles. Microsoft has their own staff of goons that search eBay looking for these kinds of listings to make sure that the rules are being followed. For a while we were able to get away with not including a piece of hardware but then they caught us and took down our auctions. So we have gotten into the habit, like Mike said, of including an IDE cable or something along those lines with the auction. It can be something small, including a cover plate for the PCI cards, but it should be there to keep the auctions from being pulled.