Hi, Anyone know of a reputable place online where one could purchased a certified used/refurbished previous generation, Intel Core 2 Duo, iMac? I know the Apple store sells a few, but not a lot. And, of course, I am wanting one that would hit that value/benefit ratio where just buying a new one would not make more sense. I think I want to avoid buying one off an individual from eBay -- I can just forsee a bunch of issues with that approach. Maybe locally from CraigsList, but even then.... Thanks.