Apparently you can trade just about anything in DD2 including Seeker's Tokens, Golden Trove Beetles, and Portcrystals; I'm on PS5 and apparently you can only summon other PS5 pawns but could still use this thread for PC trading and what not. Simplest way to trade is set an easy quest and put a reward up, then send the person your Pawn ID, change the quest after the trade is complete. Might be an issue if your pawn is too popular. You can also do this yourself on a different character but that would be pretty time consuming.