PCPartPicker part list:
http://pcpartpicker.com/p/2N9wP
Price breakdown by merchant: http://pcpartpicker.com/p/2N9wP/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2N9wP/benchmarks/
CPU: AMD Athlon II X4 750K 3.4GHz Quad-Core Processor ($79.98 @ OutletPC)
Motherboard: MSI FM2-A75MA-E35 Micro ATX FM2 Motherboard ($53.18 @ NCIX US)
Memory: Kingston Blu 8GB (2 x 4GB) DDR3-1600 Memory ($69.99 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.66 @ OutletPC)
Video Card: Asus Radeon R7 260X 2GB Video Card ($143.49 @ Amazon)
Case: Cougar Spike MicroATX Mini Tower Case ($34.99 @ TigerDirect)
Power Supply: Corsair Builder 430W 80+ Bronze Certified ATX Power Supply ($19.99 @ Microcenter)
Total: $461.28
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-04 12:06 EST-0500)