Webuser Forums: Dodgy ebay auction...?

One of the biggest problems about eBay for me is the potential for selling "knock off" goods.
I have seen an auction for a computer which just doesn't seem right to me and suggests that the item could be stolen. It's for a portable computer that is being sold with no power adapter or discs, and which, when the seller boots up Windows comes up with a password screen. The seller says he doesn't know the password as he bought the computer in a box of computer bits at a car boot sale for £10 (these computers normally sell on eBay for around the £300 mark.) He also says that he can't sort out the password issue as he's no good with computers.
My question is this: Is there anything meaningful that I can do about this? Will reporting the auction to eBay have any effect? Is there anyone else I could / should inform?
I am concerned as I have one of thes PCs and I'd hate to be in the position where someone nicked mine and put it on eBay!

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