350$ gaming PC!

PCPartPicker part list / Price breakdown by merchant

CPU: AMD A10-5800K 3.8GHz Quad-Core Processor ($84.99 @ SuperBiiz)
Motherboard: Gigabyte GA-F2A88XM-D3H Micro ATX FM2+ Motherboard ($47.98 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory ($29.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.98 @ OutletPC)
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($36.99 @ SuperBiiz)
Power Supply: Antec 450W ATX Power Supply ($29.98 @ Newegg)
Total: $279.91
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-12-06 16:51 EST-0500
 
windows 7 is overpriced on pcpartspicker. im sure you can find a copy somewhere for $75 or less though. is there a specific reason you do not want a newer version of windows? windows 10 is far superior to any previous versions. if you know someone who goes to a state college or university you can get a discounted price on windows.