Need an advice here (Neverwinter, AD currency)

[Klahax]

Hi, My name is John and Im planning on leaving a game. Neverwinter for Ps4 I have some stuff that I wont need anymore mainly currency and some items (secondary objetive)
I dont want to quit the game and leave all that stuff in the void

So I was thinking on selling all my currency (Astral Diamonds) to another gamer that would make a good use of them.

I dont know how people here make a safer transaction to be honest so that site suit fine for me, unless I find a safe way here.

I currently have my diamonds selling in another site and I dont know if I should use this site to make buyers go over there.

I used that site once and were perfectly safe for both the buyer and me the seller.

So my first question is:

Can I link/add the sell Im making in the other site

and my second question is:

Is there a safe way to sell my Astral Diamonds here? :confused:

Thank you for reading.