Smoldering Egg of Millagazor: 125k
Life-Binder's Handmaiden: 175k
Currently the drop rate of both mounts is 100%, but with the release of MoP, both are being reduced to a 1% chance.
We've already sold a handful of mounts to date, and prices are negotiable.
If you have any questions, feel free to post them here, or whisper anyone in guild in-game.
Edit2: Removed RealID due to gold spamming.