Is cpu, motherboard, RAM, and video card the only parts you need? What about case, power supply, hard drive, windows, etc...
PCPartPicker part list:
http://pcpartpicker.com/p/3j8hx
Price breakdown by merchant: http://pcpartpicker.com/p/3j8hx/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3j8hx/benchmarks/
CPU: Intel Core i3-4130 3.4GHz Dual-Core Processor ($118.93 @ OutletPC)
Motherboard: MSI B85M-P33 Micro ATX LGA1150 Motherboard ($58.98 @ SuperBiiz)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ Newegg)
Video Card: EVGA GeForce GTX 750 Ti 2GB Video Card ($149.99 @ NCIX US)
Total: $392.89
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-30 14:29 EDT-0400)