PCPartPicker part list:
http://pcpartpicker.com/p/yNy2
Price breakdown by merchant: http://pcpartpicker.com/p/yNy2/by_merchant/
Benchmarks: http://pcpartpicker.com/p/yNy2/benchmarks/
CPU: AMD A10-5800K 3.8GHz Quad-Core Processor ($116.99 @ Amazon)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($24.99 @ Newegg)
Motherboard: ASRock FM2A85X Extreme4-M Micro ATX FM2 Motherboard ($97.55 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($46.98 @ Amazon)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($57.99 @ NCIX US)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($49.99 @ NCIX US)
Power Supply: Logisys 550W ATX12V Power Supply ($22.98 @ Outlet PC)
Total: $417.47
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-21 13:11 EST-0500)