Sold by Mei Francis in Dalaran for 675 gold.
Purchased from the Guild Vendor for 3,000 gold, requiring Guild Glory of the Cataclysm Raider. Crafted / Auction House Mounts Reins of the Phosphorescent Stone Drake wow cataclysm buyable mounts
Bought from Blacksmith Abasi in Uldum for 80 gold, requiring Exalted with the Ramkahen faction. Sold by Mei Francis in Dalaran for 675 gold