Like it happened with the other expensive mounts that still cost around 5 million credits? :P
Speaking of nosedive, the Progenitor had a Bantha for 5,5 million creds in the GTN today, I fully expect them to go down further.
That's a point I was going to make. Most of the old "OMG I NEED THIS!" mounts are still listed for a few millions, but they never seem to sell (same seller names keep popping up) and once in a while someone puts one up for 1-2 million. Those usually get snagged pretty fast but even those remain unsold for some of the older ones.
I think greed is just kicking in and people think that others are still happy to pay millions for a mount that almost everyone has.