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20" iMac is now the low end. And at refurb prices it is about $1,049. However the white iMacs came in a 17" edition with integrated graphics like the MacBook and Mini and did not include Superdrive or remote as well as less RAM and smaller Hard Drive. I think the current 20" iMac is the same price as those were, but you could probably get one used for $600 or so.
 
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