This is what i picked up back at the beginning of 2013 .. and its working very nicely for me.. A much needed massive power boost over my prior 2007/8 rig.   I added a 4 screen graphics card I picked up from amazon. A new power supply and slapped the whole thing in my existing case with a 3tb drive.  Total outlay approx $600.  No complaints at all.
AMD FD6100WMGUSBX FX-6100 Processor - Six Core, 8MB L3 Cache, 6MB L2 Cache, 3.30GHz (3.90GHz Max Turbo), Socket AM3+, 95W, Fan, Unlocked, Retail
MPN:  FD6100WMGUSBX
 $105.99 $105.99 
1 B450-8800 Biostar AMD 970 Motherboard - ATX, Socket AM3+, AMD 970, DDR3 2000 MHz (OC), SATA III (6Gb/s), RAID, Gigabit LAN, USB 3.0 (TA970)
MPN:  TA970-R
 $65.99 $65.99 
1 C13-4112 Corsair Vengeance CMZ16GX3M2A1600C10R 16GB Memory Module Kit - 1600 MHz, DDR3, 2 x 8GB, 240 Pin, DIMM, 1.5V, CL10, Red
MPN:  CMZ16GX3M2A1600C10R
 $109.99 $109.99