So i just got to exalted and their is 3 versions of Zandalar madcap set
And i got the 2nd to last and im supposed to trade that in for the Set Pce called the Zandalarian Shadow Mastery Talisman
And it is not allowing me to trade it
but on my warlock im allowed to trade it

Realm : Icecrown
(wotlk)
Player name : Isisvevo
Proof : http://imgur.com/a/91hYz