This Should be good
PCPartPicker part list:
http://pcpartpicker.com/p/m9R7GX
Price breakdown by merchant: http://pcpartpicker.com/p/m9R7GX/by_merchant/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($118.00 @ Amazon)
Motherboard: Asus M5A97 LE R2.0 ATX AM3+ Motherboard ($69.99 @ Newegg)
Memory: G.Skill Ripjaws X Series 4GB (2 x 2GB) DDR3-1600 Memory ($42.30 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($52.91 @ OutletPC)
Video Card: MSI Radeon R9 270X 2GB TWIN FROZR Video Card ($159.99 @ Newegg)
Case: Aerocool Strike-X One ATX Mid Tower Case ($48.99 @ Amazon)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($34.99 @ Newegg)
Total: $527.17
Prices include shipping, taxes, and discounts when available