Does anyone have any experience purchasing Windows XP on eBay? I've purchased software before, like Quicken and Peachtree, but never an OS with all the piracy protection Windows has. I just had a novel idea of selling my computer (I think I can get $300-400 for it) and I'm sure I'll have to have Windows XP installed on it when I sell it. They're probably going to want the disk (if they're smart), but I want to keep it for myself, so I can install it on my MacBook. There are OEM versions on eBay for around $100, and pricegrabber.com lists it, retail, between $170 and $200. Would I have a problem with the OEM version? As long as it works, I'll be happy.