Are there any online retailers you'd recommended for older (Rev A, B, C) Airs? I need a computer that will only be used for text editing (no browser, no flash, no other apps) so it seems silly to buy a brand new Air with all the bells and whistles. I don't even mind minor cosmetic damage. The problem is ebay is a wasteland of overpriced Airs, completely broken ones, and possible scammers. So where do I find a good old Air where I won't get scammed?