This is a great deal but there is a problem. You can tell there is a problem because of all the negative reviews with people complaining about lack of hard drive space. Rather than give you step by step how to fix it I will tell you what was messed up with my unit and how I fixed it. The problem - the Fusion Drive is split. How to fix it - see "How to fix a split Fusion Drive" in Apple Support.  Important thing to also know - a PC type keyboard is supplied with the iMac. The "option" key (Mac keyboard) on the Intel keyboard is "Alt". "return" is "enter".  "Command" is that "window flag" . OK now you should be able to figure it out especially if you have some old computer skills. If you don't, maybe a friend can help? Good Luck and it eventually will be worth it. BTW I never called tech support. Perhaps I should have?