I know you clicked on this thinking ohh another repost about the vial of the sands. but no. How ive been making some realllly nice gold is making some Deepstone Oil and putting them in the AH undercutting everyone.
After you do this you save 1 and go outside of the AH and do /mountspecial and then use the potion to freeze you in a cool pose. I've had tons of whispers asking how i got my mount to do that. Link them the Deepstone oil and they go grab it like hot cakes.