Hey, My brother has got the chance to grab a single CPU 4,1 Mac Pro for 550 (around 580$). The system specs: 4x 2,66 GHz 16GB RAM GT120 640GB HDD So pretty much the default setup just using more RAM. I personally paid about twice as much around 1-2 years ago. I bought a dual CPU model though. I think it's a good price but I thought I'd ask you guys beforehand. Thanks!