http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170254411802&ssPageName=ADME:B:SS:US:1123 Auction looks authentic and seller feedback history has only positive transactions. I must say it is quite a deal to get over $400 off, and this is a brand new factory sealed iMac. Unfortunately I would've grabbed this beast right off the bat but I bought an older 24" 2.4Ghz iMac awhile ago on eBay, which was also brand new and factory sealed. And I was wondering, is there any difference between the 2.4Ghz 24" iMac and the 2.8Ghz 24" iMac besides the faster processor? It looks to me like everything else hardware wise seems to the same, but I haven't checked both specs closely.