Never deal with this user, rude, unprofessional and a total jerk, deal only if you want to get scammed, you have been warned.
I know that it could be possible but why not provide some proof? I asked on your thread the price of CSGO and you didn't even reply as you posted just new game for sale. Isn't it unprofessional also for you as a seller?
I am not favoring the guy, its just that you both could have the same attitude.