Anyone ever bought a used Mac laptop on eBay? I've long tinkered with the notion of having a laptop to play around with (web browsing in the den and on the road, homework, etc) ever since my old HP died 4 years ago, and recently I thought about buying previous generation Mac stuff used. With the new MBPs out I figure the market should be flooded soon with older MBPs. Is there a better outlet then eBay?