If you think you're too good to get carried through 8/8H and pay for a mount, come with my friends to kill heroic Deathwing! There is no cost to roll on any mount or loot that drops. Trying to make sure as many people as possible have a chance to see the encounter before it's made irrelevant in 5.1.

Even better, usually 50% or more of the 10m raid already has the mount. While this obviously isn't a guaranteed mount like the selling threads promise, you also save quite a bit of gold.