Oh my... this Black Market AH thing could actually get me to restart playing WOW seeing as I'm a big mount collector...
By the way, Dreamshatter and Earthshatter are old naxx T3 gear, so I assume there will be unobtainable stuff on the AH? =O Unobtainable mounts woot!
Can you imagine buying the Black quiraji tank from it?, or Reins of the Black Proto-drake? Holy... =D