Be nice if we could use Advanced Unbinders to move em.
Edit: Actually, that's not a bad idea. Advanced Unbinders cost how much more/less than a mount? If its not too far off from each other i say do it. Each character has to be on the same server of course, RoM still gets Diamonds, cause you'd need an Adv unbinder each time (I don't expect them to lower it down to Basic unbinders, too little profit), the players get an extra choice: Buy another mount, or buy an Adv unbinder. Some of us don't want to wait for decent mounts to go on sale so we'd rather pay to transfer it over. On the flip side, some of us don't have a problem waiting and buying another mount.
It'd just be another, non game breaking, way for people with too much money to blow it faster