As seen here

Warlords of Draenor - Black Market Auction House Update
Kalidiar has been keeping an eye out for new BMAH items, and spotted the Kor'kron Shaman's Treasure up for sale. This is the Shaman transmog set from Siege of Orgrimmar.

Click image for larger version

Name:	cosmetic_shaman.jpg
Views:	1
Size:	27.2 KB
ID:	89903