Try this:
PCPartPicker part list:
http://pcpartpicker.com/p/1i3l9
Price breakdown by merchant: http://pcpartpicker.com/p/1i3l9/by_merchant/
Benchmarks: http://pcpartpicker.com/p/1i3l9/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($119.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler ($19.99 @ Newegg)
Motherboard: MSI 970A-G43 ATX AM3+ Motherboard ($75.91 @ Newegg)
Memory: Crucial Ballistix Sport 4GB (1 x 4GB) DDR3-1600 Memory ($29.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ NCIX US)
Video Card: Sapphire Radeon HD 7850 2GB Video Card ($169.98 @ SuperBiiz)
Case: NZXT Gamma Classic (Black) ATX Mid Tower Case ($24.99 @ Newegg)
Power Supply: Corsair Builder 500W 80 PLUS Bronze Certified ATX12V Power Supply ($29.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($14.99 @ Newegg)
Total: $534.82
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-07-18 15:32 EDT-0400)