Selling my gaming computer?

Honestly you could get a lot more for that. I would suggest selling the GPU separately for around $150 (since the RX 470 is about the same in performance and costs around $170 new), and the CPU/motherboard/RAM as a combo for around $150-200. You can reuse the case and power supply for your next PC, and for the hard drive just format it, fill it up with random useless files and format it again, then sell it for like $10-15.

You might be able to sell the individual parts for more than the entire thing together. The EVGA 970 is about $500 these days, and the i7-2700K is about $650. Since these are used parts, take about 40% off of their new prices, and you're probably still expecting to get more for the parts than the whole thing. Check prices on Ebay, to see what you can expect to pay for it. If you have the original boxes for these parts, it'll be even easier to sell them.

Why would you sell such a beast machine..it can run allmost any title maxed out,without any problem..

i myself use core 2 quad till today(even though it is extremely outdated)..but i love this chip it is bit slow but i game on it with pretty good fps...i have gtx 570 card..