Great 700 dollar used build with an i5 2500k i found on ebay for $94 dollars. The 2500k is almost as good as Intel's newest processor line (skylake) in gaming with a frame difference between 5-10fps. This build only has 2 used parts, the CPU (of course) and a LGA 1155 Z68 motherboard and both parts were found on Ebay. This build should run any of the latest titles 60fps on a mix between high and ultra (on games like the Witcher 3 you'll get around 45-55fps on ultra). Links are down below. Pcpartpicker:.