Have any of you had any experience buying Mac Pros on eBay? A brand new Mac Pro is way out of my price range, but a used one is basically within budget. The main thing I'm worried about is not cosmetics, but if the system slowed down after a lot of use. I'm not sure if I'd go the eBay route, but if I did I'd assume I'd do a completely new install of OS X in order to make sure everything's running in the condition it was in shipment. Would that be a safe plan? Buying off eBay, getting Apple Care and then doing a system restore or OS X reinstall?