Any links to local online stores which would have reasonable selections ?
Other than that something like this might be good for you. If you have a little bit more money to spend, you can upgrade the graphics to a 7850. Or if you don't need the OS for example.
PCPartPicker part list:
http://pcpartpicker.com/p/2kTnS
Price breakdown by merchant: http://pcpartpicker.com/p/2kTnS/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2kTnS/benchmarks/
CPU: AMD Athlon II X4 750K 3.4GHz Quad-Core Processor ($79.98 @ OutletPC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: Gigabyte GA-F2A88X-D3H ATX FM2+ Motherboard ($87.99 @ Amazon)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($52.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: PowerColor Radeon HD 7790 1GB Video Card ($89.99 @ Newegg)
Case: Corsair 300R ATX Mid Tower Case ($59.99 @ Microcenter)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($54.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($16.98 @ OutletPC)
Operating System: Microsoft Windows 8.1 - OEM (64-bit) ($94.99 @ NCIX US)
Total: $627.86
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-15 19:14 EST-0500)