I'm thinking of picking up a 2011 21.5" iMac on the cheap and had a few questions. Is $400 a fair price for one in very good cosmetic condition with the following specs? 2.7Ghz i5 500GB HDD (ew) 16GB Ram AMD 6770m 512MB A friend of mine claimed that these were not available with a true quad core CPU. Is this correct? Is 16GB the limit of RAM? Not that I ever need more than that. I understand the hard drives are hard to replace on these models. In your collective experiences, about how much can I expect to spend in order to place an SSD in the machine (under the assumption I already have an SSD). The GPUs on these machines are in fact upgradable yes? Is this generally advisable? The 6770m seems short on VRAM. Do these have the same GPU failure issues that the MacBook Pros had as a result of using the same chips? Are the displays on these machines IPS? Any reliability or operation quirks? Problems with cooling? I'm happy to hear any tips or experiences with current owners of these machines now as well. They are a bit aged but, if the slowing progress of the mobile chip space is anything to go by I'm thinking this will be more than powerful enough even today and far more powerful than my MacBook Pro correct?