I managed to acquire a Mid 2007 MBP 15" for just shy of $60 in a private deal just now. Granted, it does have a few faults in that it came without a battery, one of the RAM slots doesn't work, and the RAM cover on the bottom of the machine is missing, but I think $60 is pretty reasonable. It's perfectly functional and in quite good cosmetic condition. Core 2 Duo 2.2 Ghz, 8600M GT 128 MB and 2 GB DDR2 RAM in one module. It runs Leopard 10.5.8, which I might upgrade to Snow Leopard or possibly Mountain Lion. I don't think Yosemite would be wise on this machine, even though it does support it (as the oldest Mac of all, in fact). I've always been fond of the pre-unibody design, so when I saw this I decided to jump on it. Should be fun to play around with. I might try setting up a Time Machine server on it. If anyone has a RAM cover for this model lying around, feel free to send it my way. Or perhaps an idea for how I might fix the second RAM slot? Oh, and I'm posting from it now, by the way.