76561198066100040

Had to change positive review to negative, we traded his GOG KSP CD key for my CSGO case ...there were some problems with the trade (first key, that he gave me didnt work) but we sorted it out, he gave me another one and then, all went fine. Game was working, and in my library for more than month or two but then, it was removed. When I tried to activate that CD key again, it was invalid. So I suppose that he revoked his payment for the games or something like that.