Vendor: Landro LongshotLocation: Booty Bay
This mount is from a TCG loot card from the "Throne of the Tides" expansion.
The name of the loot card is Wasteland Tallstrider. To redeem the code on the loot card: you'll need to visit WoW's Promotion page, redeem the 25-digit code, copy or write down the second code given to you, log into the game and visit http://www.wowdb.com/npcs/17249-landro-longshot.
The game item may be traded to another player.
As always, be very wary of deals that sound too good to be true - because they always are. If you want to purchase the WoW TCG loot card, make certain to buy from a reputable website.