Even though he has 100% feedback he could do some stuff to it. In the descriptions they might lie about it being unopened and sealed in the original box. They might have used it but it will still look new and unopened. On the other hand, you can get it for cheaper there.
I know there was a thread a few days back on whether it is a good idea to purchase a laptop on Ebay. I have one question about this--can I still get a warranty from the manufacturer if I buy the item through Ebay? Do I need any additional info, such as where the buyer originally purchased the item?
The laptop I'm interested in is a Sony SZ220, and although I'm extremely nervous and skeptical about buying through Ebay, the seller has a 100% feedback rating and if the price stays around where it is, (which would save me app. $400 off the sale price of $1750 currently at Best Buy) I might be tempted, provided I can still get a warranty directly from Sony. Any thoughts or insight would be much appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic