First of all I purchased a 27 inch week 51 core i7 from a power ebay seller, MacMan812 (I've seen his posts on macrumors). He seems legit and I've actually talked on the phone with him last week about my shipping status and he promptly emailed me back the fedex tracking number. So I received the package today. It's brand new, sealed in the box (as described). I was hoping for a wireless keyboard and wireless magic mouse but it came with the wired keyboard and wireless magic mouse (no big deal since I wasn't a big fan of the wireless aluminum keyboard on my 24 inch alumn iMac previously). Now the more pressing issue is it's missing 4GB of RAM. He advertised 8GB of DDR3 memory and the system only reads 4GB. For me to purchased an additional 4GB DDR3 RAM would cost between $100-120 online and it's missing the 3 year AppleCare. What should I do? Thank god this iMac doesn't have the "yellow tinting" as reported by numberous macrumors member so I'd like to keep this computer. But I've only had the computer for 3 hours so I've heard the yellowing could occur the more you use the computer. But I am missing 4GB DDR3 RAM and the 3 year AppleCare. I left MacMan812 a voicemail a couple of hours ago and also send him an email. Do you think it's reasonable to ask for at least a $150 refund credit to my original purchase price (I paid $2459 for the iMac which is supposed to have 8GB RAM/3 year warranty). I get a $196 bing.com cashback. I have 3 days to return the computer. Or if he doesn't respond, should I file an ebay dispute since the item is obviously missing RAM/Applecare? I was impatient and wanted an iMac now instead of waiting for 2-3 weeks to have it shipped. Price wise, I would have paid almost the same from ebay or apple.com (since I get a little educational discount).