It's not underestimating demand. Star Ace simply didn't want to run the risk of excess inventory. Look at Mad-Eye Moody -- there's so much leftover stock that Amazon sold him for half off in December.
Um, you're grasping at straws. They didn't underestimate demand. If the demand was there, they would've manufactured more during the pre-order phase. Darklord Dave has made this point repeatedly in various Harry Potter threads.
As for dress robes...they look ghastly. Having to look at his...
Okay, Mr. Crawford's pictures clearly show that the sculpt does not look like Rickman...but I don't like the Medicom sculpt either (looks like a woman pretending to be Rickman).