Purchased bears Edit
While the rigging on the bears differs between Alliance and Horde, you are only offered your faction's version by Mei Francis in Dalaran. This will set you back 750, less any Kirin Tor reputation discount.
Achievement reward bears Edit
Loot bears Edit
Other bear mountsEdit
The Big Battle Bear is a reward from turning in the code on one of the collectible game cards.
The Big Blizzard Bear was a reward from the BlizzCon 2008 welcome package (or from getting the DirectTV subscription in the USA).