This would actually not be as bad as you would think.
PCPartPicker part list:
http://pcpartpicker.com/p/bz7QhM
Price breakdown by merchant: http://pcpartpicker.com/p/bz7QhM/by_merchant/
CPU: AMD A10-5800K 3.8GHz Quad-Core Processor ($89.99 @ NCIX US)
Motherboard: Gigabyte GA-F2A88XM-HD3 Micro ATX FM2+ Motherboard ($55.18 @ Newegg)
Memory: G.Skill Ripjaws Series 4GB (2 x 2GB) DDR3-2000 Memory ($49.99 @ Newegg)
Storage: Seagate Barracuda 160GB 3.5" 7200RPM Internal Hard Drive ($24.99 @ Amazon)
Case: Azza SIRIUS ATX Mid Tower Case ($24.99 @ Newegg)
Power Supply: Corsair CSM 450W 80+ Gold Certified Semi-Modular ATX Power Supply ($29.99 @ Newegg)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $365.11
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-11-20 22:41 EST-0500