[Build Help]Upgrading a prebuilt PC?

I'd try to sell it and gather about $100-150 more, then you could get this:

PCPartPicker part list / Price breakdown by merchant

Type Item Price
CPU AMD FX-4200 3.3GHz Quad-Core OEM/Tray Processor $59.95 @ SuperBiiz
CPU Cooler *Arctic Cooling ACALP64-GT 25.6 CFM CPU Cooler $8.99 @ Newegg
Motherboard Gigabyte GA-78LMT-USB3 Micro ATX AM3+ Motherboard $51.98 @ Newegg
Memory *Team Elite 8GB (1 x 8GB) DDR3-1600 Memory $49.99 @ Newegg
Storage *Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive $44.99 @ Best Buy
Video Card *XFX Radeon R9 280 3GB Double Dissipation Video Card $164.99 @ Micro Center
Case *Apex PC-389-C ATX Mid Tower Case $29.98 @ Amazon
Power Supply *EVGA 500W 80+ Certified ATX Power Supply $24.99 @ NCIX US
Prices include shipping, taxes, rebates, and discounts
Total (before mail-in rebates) $485.86
Mail-in rebates -$50.00
Total $435.86
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2015-04-06 11:45 EDT-0400
/r/buildapc Thread