My early 2008 MBP had been getting slow for Aperture and Photoshop Elements, so I finally pulled the trigger on a 2012 quad-core i7 Mac mini from the Apple Refurbished Store. Gazelle will give me $430 for my old MBP, and I probably could get a bit more if I sell it on Craigslist. I notice that a lot of people on this forum hang onto their older Macs, and I'm curious as to what you do with them, other than having a backup handy in case your main Mac needs repairs. I'm debating between hanging onto mine or selling it while it still has value (or before the NVIDIA GeForce 8600M GT GPU goes bad, which already happened once, while it was still under AppleCare). I'm leaning toward selling, but if someone says, "It would make a great <fill in the blank>!" (and no, not a great doorstop), I might hang onto it.