From the Garrison Building Specializations:
"GarrSpecialization #3 - Mount Trader - A rare mount trader has taken up shop at your garrison stables building."
What do you think this means? Will it serve as a personal BMAH with rare mounts randomly appearing on his list for very high prices, or will he offer a randomized selection of new WoD mounts? If it's the former, will we be able to phase in to a friend's Garrison and buy a different mount from this NPC?
Or perhaps he will allow us to trade in rare mounts for a special currency that we can use to buy different ones? So, if we get a second Ashes of A'lar, we can exchange it for a Fiery Warhorse, which will incentivise people to keep farming a boss even after obtaining his particular mount?