This is just insanely cheap

[TheRandomness]

You can do a fair amount better for under $500.

[1shanghai]

This is my suggestion

PC Part Picker:http://pcpartpicker.com/p/n8VRLk

 

PCPartPicker part list: http://pcpartpicker.com/p/n8VRLk
Price breakdown by merchant: http://pcpartpicker.com/p/n8VRLk/by_merchant/

CPU: AMD Athlon X4 860K 3.7GHz Quad-Core Processor  ($72.89 @ OutletPC) 
Motherboard: ASRock FM2A68M-DG3+ Micro ATX FM2+ Motherboard  ($44.99 @ SuperBiiz) 
Memory: Crucial Ballistix Sport XT 8GB (2 x 4GB) DDR3-1600 Memory  ($29.99 @ Newegg) 
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive  ($46.89 @ OutletPC) 
Video Card: EVGA GeForce GTX 960 2GB Superclocked Video Card  ($179.99 @ Amazon) 
Case: Thermaltake Versa H22 ATX Mid Tower Case  ($34.98 @ Directron) 
Power Supply: Corsair CX 430W 80+ Bronze Certified Semi-Modular ATX Power Supply  ($42.98 @ Newegg) 
Total: $452.71
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-03-04 05:31 EST-0500

 

Or if you can wait and live in europe, you can get these sedatech gamer advanced computers for up to 67% off!. this is cheaper than building yourself if you can find the right one. Right now they are completely overpriced. 

http://www.amazon.co.uk/s/ref=sr_pg_2?rh=n%3A340831031%2Cn%3A428651031%2Ck%3Asedatech+gamer+advanced&page=2&keywords=sedatech+gamer+advanced&ie=UTF8&qid=1457087458