I know you do , but if you want a karambit , you would set your buyout karambit keys and not pure keys . <| sep |> Personal trade experience that surpasses the SPMI attempt to test ever preowned system my store sells well beyond base requirements . During the trrade , I do the basic tests . Does it turn on ? Does a controller connect ? Does it read discs ? Parental locks ? Done . Then , during down time , I fully test the system . I boot up a game in which I can fully test every button on the controller . I connect the system to the internet with both wifi and a LAN cable . I test every USB port . I launch an online game to make sure the console isn ' t banned . I check both the av and HDMI port on last gen systems . And I deep clean it . I spray it with the duster long after the air comes out clear . I take a toothbrush to every nook , cranny , and vent . I use goo gone on any residual residue . I wipe clean every cable , and scrub the controller . If someone is going to give me a hundred dollars plus for a piece of electronics , then I ' m going to make sure it ' s clean and functional . I ' m going to confidently tell them it ' s been through a rigorous course of tests .