PCPartPicker part list:
http://pcpartpicker.com/p/K7vd
Price breakdown by merchant: http://pcpartpicker.com/p/K7vd/by_merchant/
Benchmarks: http://pcpartpicker.com/p/K7vd/benchmarks/
CPU: AMD A8-3870K 3.0GHz Quad-Core Processor ($88.99 @ NCIX US)
Motherboard: Asus F1A55-M LE Micro ATX FM1 Motherboard ($49.99 @ Newegg)
Memory: Kingston Blu 8GB (2 x 4GB) DDR3-1600 Memory ($43.84 @ NCIX US)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($49.99 @ Amazon)
Case: NZXT Source 210 (White) ATX Mid Tower Case ($39.99 @ Amazon)
Power Supply: Corsair Builder 430W 80 PLUS Bronze Certified ATX12V Power Supply ($34.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($15.98 @ Outlet PC)
Operating System: Microsoft Windows 8 (OEM) (64-bit) ($89.98 @ Outlet PC)
Total: $413.75
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-16 16:39 EDT-0400)
Should max it out.