I need to sell my PC, but dont know how much.

Apr 12, 2018
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I need to sell my gaming PC. Used medium amount. Not a hardcore gamer, I mainly play Rocket League and League of Legends. Both games do not even require half of my build to run at max settings. Graphics Card and HDD are 7 months old, everything else is around 2 years old. I have not had any problems with it at all. I just have no idea what to sell it for, or even where to sell it. I made a PCpartpicker list with everything I want to sell on it. Here is the permalink to my build: https://pcpartpicker.com/list/74bk6s (Note on PCpartpicker the cost of the RAM and Motherboard do not show up, new they are $79.99 and $298.68 respectively)
I have a friend who builds monster PCs then sells them, but he usually sells part by part, I don't know how I should sell them or on what platform to use. If anyone has suggestions that would be fantastic.