I'm personally not going to bother. They look just like the RaF mount, which almost everyone has at this point. Only hardcore mount collectors will be interested.
Unless the dupers shart showing up again selling super-cheap Orb of Mystery, I'm not even going to bother making the mounts for myself since the Living Steel are much too valuable (epic crafting gear plus belt buckles) to waste.
On my server you need to pay about 32k in mat cost to make one and somehow there are several people selling them for less than 25k in Trade now.... AH price is around 50k, but none have sold there as the same ones are always up. People are also expecting to get the Onyx Panther for less than the orb cost already. My highest offer was 60k, most people offer 20k or less. Apparently spending 180k to make one and charging 200k to sell it is way overpriced.
Made my first ruby panther for someone in trade he gave me a 50g tip i gave up from there not to mention people on my server are barely selling over what they cost so I won't even bother trying to make a profit :/