PCPartPicker part list:
http://pcpartpicker.com/p/kWdrnQ
Price breakdown by merchant: http://pcpartpicker.com/p/kWdrnQ/by_merchant/
CPU: Intel Pentium G3258 3.2GHz Dual-Core Processor ($63.99 @ SuperBiiz)
Motherboard: Asus H81M-D PLUS Micro ATX LGA1150 Motherboard ($44.49 @ Newegg)
Memory: Corsair XMS3 4GB (1 x 4GB) DDR3-1333 Memory ($22.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($43.79 @ OutletPC)
Video Card: Asus GeForce GTX 750 Ti 2GB Video Card ($123.99 @ SuperBiiz)
Case: Thermaltake VL80001W2Z ATX Mid Tower Case ($19.99 @ Micro Center)
Power Supply: Cooler Master Elite V2 550W ATX Power Supply ($29.99 @ Micro Center)
Monitor: LG 22M35D 60Hz 22.0" Monitor ($87.99 @ NCIX US)
Keyboard: Logitech K120 Wired Standard Keyboard ($7.99 @ NCIX US)
Mouse: Zalman ZM-M400 Wired Optical Mouse ($9.99 @ SuperBiiz)
Total: $455.20
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-02-08 18:34 EST-0500
My build didnt include an OS though.