PCPartPicker part list:
http://pcpartpicker.com/p/2dcER
Price breakdown by merchant: http://pcpartpicker.com/p/2dcER/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2dcER/benchmarks/
CPU: AMD Athlon II X4 760K 3.8GHz Quad-Core Processor ($89.99 @ Amazon)
Motherboard: ASRock FM2A75M PRO4+ Micro ATX FM2+ Motherboard ($81.98 @ SuperBiiz)
Memory: A-Data XPG Gaming Series 8GB (1 x 8GB) DDR3-1600 Memory ($59.99 @ Newegg)
Video Card: Asus Radeon HD 7870 GHz Edition 2GB Video Card ($139.99 @ Newegg)
Total: $371.95
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-02 00:39 EST-0500)