I wouldn't mind acting as an escrow for free, as long as you can agree on a specific level and there are no ambiguities.
I was going to suggest either Direwolf or Blancode, as I know they have previous experience on that. Your trade is history is rather amazing, so for a small ammount of 25$, I think that's fine by me.
About the level, for what I've understood in the OP, the character is currently at level 52 and has to be leveled up to 60. Some more info on the class, etc would be helpful