Mounts @shop

Hello fellas,

I have noticed that our shop lacks of many of the mounts present on Icecrown. Of course it’s understandable as far as Invincible Reins and Wrathful Gladiator Wyrm are concerned since the content is not yet available, but it would be great to grasp some old amazing mounts and jump on the saddle.
Is there a specific reason for the total absence of the rest of the pack?

Thanks,
Have a great day!