I'm looking for help pricing my cMP 5,1. I've been considering selling it and downgrading a bit to get a 27" Retina iMac, I just don't use the horsepower of my 5,1 much these days and am attracted to the clean all in one nature of the iMac. I'm not looking to make any deals, just curious on the perceived value of my machine. 12 Core - 3.33GHz Xeon Processor 64GB ECC DDR3 1333 GTX 770 4GB (Mac flashed | display port, hdmi, 2x dual DVI) Wifi AC & Bluetooth 4LE upgrade (native handoff and continuity support) 2x240GB PCI-SSD Raid 0 (480GB boot volume) Sonnet USB 3.0 PCIe (4 ports) Blu Ray super drive upgrade 27" Apple Cinema Display I've done a lot of upgrades to the machine, and understand that won't help me much. However, if the value is nowhere near a retina iMac I guess I'll just stay put.