My take on refurbs is that something has happened to the computer that means that it can not be sold as new. I'm guessing the machines are anything from simple scratches to returned machines that needed a new motherboard or maybe a component failure (hard drive or vid card) combined with a return? What are the limits on what constitutes refurbs and where do they come from? In theory they should be fine. Computers are mostly assembled components. Replace the failed component and you should be good to go. Cosmetic issues are even less of a concern.