Hey, I have been looking to buy a used iMac, for I can not afford a new one right now. I want something reliable, that is why I am looking at iMacs. I have been looking at the 21.5" screens and want at least 500G HD. Other than that, I do not know what I want. It is for home use; mainly email, internet, and photo. Maybe watch movie here and there. I plan to look at one I found on craig's list this weekend, yet I don't know what to look for when inspecting it. Here is what is advertised: late 09 imac. It is perfect in every way. Condition is excellent and functionally perfect as well. Currently running OSX Mountain Lion. Here are some specs: 21.5" Intel Core 2 Duo 3.06GHz 500GB HDD Upgraded to 12GB ram using Crucial Memory Apple wireless keyboard Apple Mighty Mouse price is $600 Any suggestions and/or advise? THanks!