Funny, one tech site promoted the pre-order 1/2 price sale by saying you could buy two and "sell one on ebay" at twice the price to effectively get the other one free.

I admit I considered it for a moment.

But now I don't think I'd buy one off eBay, or from anyone who isn't a trusted friend who I know doesn't need it.

Does anyone know how MS adjudicates this when you go to activate and it shows it is on another machine? Do you have to have a sales receipt to prevail in the end? Is there something you can tell them that makes it more "yours" than admitting you got duped?