I set out to make a PC from scavenged flea market parts that cost next to nothing and I got this.

Flea market PC parts - 93$

• Asus crosshair mobo + zalman cooler + Phenom x3 @2.3Ghz - 9$ (OC to 2.7Ghz)
  
• 8gb Kingston DDR2 RAM - 5$
  
• AMD radeon HD5870 - 6$
  
• Cooler Master 650M PSU - 21$
  
• 500gb 7200rpm WD HDD - 4$
  
• 32gb SSD - 2$
  
• Corsair 120mm fan - 7$
  
• 3 X Segotep blue LED fans - 21$
  
• Deep Cool RGB LED strips and controller - 7$
  
• Dual antenna wi-fi card - 4$
  
• Creative Sound Blaster Audigy Platinum Sound Card - 7$
  

Non flea market parts - 82$

• Raidmax Artio case - 50$
  
• Kingston 256gb SSD - 32$
  

Running Ubuntu as a media PC.
On Win10 runs games at 1080p highest settings as follows:

• Blur - 60FPS
  
• Saints Row IV - 32FPS
  
• Arkham City - 43FPS
  
• Far Cry 3 Blood Dragon - 56FPS
  
• GTA IV (medium settings) - 31FPS
  

*Hardware mentioned in the builds.gg hardware section is just so I could post the build since those fields are required and I couldn't find the parts I actually used probably due to their age.