PCPartPicker part list:
http://pcpartpicker.com/p/4cvRxr
Price breakdown by merchant: http://pcpartpicker.com/p/4cvRxr/by_merchant/
CPU: AMD FX-6350 3.9GHz 6-Core Processor ($87.84 @ Newegg)
Motherboard: ASRock 970M PRO3 Micro ATX AM3+/AM3 Motherboard ($57.55 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($48.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($46.89 @ OutletPC)
Video Card: Gigabyte GeForce GTX 750 Ti 2GB WINDFORCE Video Card ($109.99 @ Newegg)
Case: NZXT Source 210 Window ATX Mid Tower Case ($30.98 @ Newegg)
Power Supply: Antec EarthWatts Green 380W 80+ Bronze Certified ATX Power Supply ($27.98 @ Newegg)
Operating System: Microsoft Windows 8.1 OEM (64-bit) ($86.98 @ OutletPC)
Total: $497.20
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-03 18:39 EDT-0400
here you go, it is just under 500$ and is all from newegg or outletPC
You will want to overclock the graphics card though, Not the cpu, it is fine.
also consider buying the hdd off of newegg, It will cost a few bucks more but all of your parts will be in one order except the OS.