Point one game which let you trade real money for stuff of other players... I can point around 5 which you can get BANNED for that. You and the seller. We are just asking to avoid this because if you get scammed, we won't do anything since "it's not or business". We already gave the option of buy rare and some unique items... and some of you QQ even about this. Ex: Many people hate the fact that you can buy Dark Meto.
Think with me: I want a new computer which I need go to another state to buy... And I can't order it from the internet.
A person says: I can buy that for you! Give me the money!
Me: OK! Thank you!
I think he will bring me the pc, but he just got my money and disappeared. Who is wrong here? Me, because I've trusted on the wrong person and he/she took my money, or the Store, because I didn't get what I wish from them?... I can't call their support and complain "MR.X SCAMMED ME! I ASKED HIM TO BUY A PC FROM YOUR STORE BUT HE WAS A SCAMMER! PLEASE, GIVE MY MONEY BACK!!"...
You guy can do those kind of negotiations if you want, but think that we will support you if you got scammed.