While I don't post much, I have been lurking regularly since about '06 and have come to appreciate and respect the vast array of knowledge and advice shared at MacRumors. So here is my question. I have been the happy owner of the iMac mentioned in the title. It was bought new in August 2010 as an i3 with 4GB RAM and a 1TB HDD. I have since bumped the RAM to 16GB, added a 256GB SSD and still have the 1TB HDD as additional storage (installed alongside the SSD). I have also bumped the i3 CPU to the 2.93 Quad-Core i7 and it runs great (no heat issues or anything - even when rendering video, I monitor it regularly). It is impeccable in terms of look and finish as well. As a long-time Apple consumer, I take great care of all my Apple products. With all that being said, my question is how much do you think it is worth? From some of the Apple buying sites I get quotes of about $1000 - $1100 but I can only list one HDD (if that even matters much?). My iMac still more than adequately meets my needs, but my concern is that it is at an age where I might begin to run into issues with future OS releases (both OS X and Windows as I use both for work) and possibly software as well. In addition to it becoming too aged for a decent resale at some point in the very near future. I am not especially intrigued by the new iMacs, at least to the point where I feel I need one over my current model (my Geekbench scores are still very respectable and are attached), but I do like shiny new toys too. What are the community's thoughts? Can I do better selling outright, or are the prices being offered by sites like gazelle and SellYourMac fair prices? I appreciate any time and advice anyone is willing to share. I have never resold an Apple product until I sold my iPhone 4 to get the iPhone 5; I typically use them until they no longer power on . I apologize for the long post, I am an over-thinker by nature which is why I don't post much, Have a great weekend, and thanks again!