You are a brand new account here, so I will tell you that this is a bad idea ever since the new terms of service came out. They have stated that they are logging pretty much every single thing that happens on site since their ToS update. If you do this now, there is a high chance they may automatically catch it, or question you, regardless of whatever method you choose (even CR/PM) as long as it's still on site. It's become very difficult to properly RMT on this game now because of all that's happened within the past 6 months (Cross, KS accounts getting hacked apparently, etc) and you are honestly better pretending like it's in exchange for different services. That covers your bases fairly easily.