Best pc (parts excluded) for under $500? Just tower

[chef hatchet]

This includes the OS(preferably windows 7) but excludes monitor, mouse, and keyboard(Already have).

I would like to play games such as rust, dayZ, and then other games like portal 2, CSGO.

This would help me greatly, I have been searching on newegg, tiger direct, amazon, best buy, eBay, any other affordable website, and even walmart. Please help me find a decent pc for my limited budget.

Thanks

 

[Turb0Yoda]

not going to happen.

 

[UsmanM4]

This is probably the best prebuilt option http://www.amazon.com/CyberpowerPC-Gamer-Ultra-GUA880-Desktop/dp/B0089KDCIU/ref=sr_1_2?ie=UTF8&qid=1395602953&sr=8-2&keywords=pc
You wouldn't be able to handle rust and dayZ yet but with a gpu upgrade you could easily!
For now it could handle portal 2 and csgo.

 

[UsmanM4]

But if you were to do a self build i think this would be a great option:
PCPartPicker part list: http://pcpartpicker.com/p/3f4CM
Price breakdown by merchant: http://pcpartpicker.com/p/3f4CM/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3f4CM/benchmarks/

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Amazon)
Motherboard: Asus M5A78L-M/USB3 Micro ATX AM3+ Motherboard ($54.99 @ Micro Center)
Memory: A-Data Premier Series 4GB (1 x 4GB) DDR3-1333 Memory ($45.36 @ Amazon)
Storage: Western Digital AV-GP 500GB 3.5" 5400RPM Internal Hard Drive ($46.95 @ Amazon)
Video Card: MSI GeForce GTX 650 1GB Video Card ($70.00 @ Newegg)
Case: Rosewill Challenger-U3 ATX Mid Tower Case ($59.99 @ Newegg)
Power Supply: Corsair Builder 430W 80+ Bronze Certified ATX Power Supply ($19.99 @ Micro Center)
Total: $407.27
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-23 15:42 EDT-0400)

I haven't chosen fans or small things such as thermal compound. Also, I couldn't find a cheap win 7 copy on part picker so here:http://www.ebay.com/itm/Microsoft-Windows-7-Professional-64-Bit-Full-Version-Coa-Product-Key-Life-time-/141126282751?pt=UK_Computing_Software_Software_SR&hash=item20dbc82dff
Overall it should add up to $500 give or take $10!!!