head over to the buy/sell forum and check out e-bay. I'll warn you that guys on here usually don't part with thier goods for a 'reasonable' price. I don't think these kids understand the concept of depreciation.
yeah, well with CPU's, they tend to either work, or don't work. So if they say it works... you kinda have to believe them. You'd really have to be dealing with a crook to get one that doesn't work.