The Wasteland Tallstrider loot card was released with the Throne of the Tides expansion set. The Wasteland Tallstrider Loot Card is redeemable for a Swift Shorestrider ground mount. Use of the Swift Shorestrider requires level 20 and Apprentice Riding.
The Swift Shorestrider is one of 4 Tallstrider mounts currently available. The others being the 2 holiday mounts (Swift Lovebird which is purchasable during the Love is in the Air event, and the Swift Springstrider, which is available during Noblegarden) & the Darkmoon Faire mount (Swift Forest Strider).
The Swift Shorestrider is easily the most attractive of all of them. The Swift Shorestrider is identical in appearance to the Swampstriders found in Swamp of Sorrows, and also the Strider Clutchmother (rare) which can be found in Darkshore. This is worth noting if you are a hunter who's looking for a matching pet to go with your mount. 😉
Swift Shorestrider is bind on equip which means you can sell or trade it in-game. Average buyout price for this Tallstrider mount is 120,000 Gold (as of Patch 5.4.2).
Swift Shorestrider Demo Video
Wasteland Tallsterider loot cards on ebay:
Search current ebay auctions for Wasteland Tallstrider loot availability and pricing.
Wasteland Tallstrider is a very rare card, found in only 1 out of 264 packs from the Throne of the Tides expansion.
Throne of the Tides booster boxes sell for around $80 on average, which means the average price for the Wasteland Tallstrider loot card would be around $600, were you to buy enough boxes to hope to pull it from a pack.
However, the Swift Shorestrider can be had for under $100 if you purchase the Wasteland Tallstrider loot card off of eBay.