All things being equal there is no question that the aussie posters are rarer than their US counterparts. And sometimes, like in this instance they are different to the US counterpart...not always.
Would it sell so high again? I doubt it, but you never know.
Will be interesting to see how long the second listing sits.
As to numbers, it's hit or miss. I've had titles where months later, as said previously, they turn up in droves. Other titles, I still can't find a single poster!
My guess is they will surface, just not right now. The movie is still just showing here...wait it out. For the bigger release titles, generally speaking they surface eventually...but there is no guarantee.
And Rich, what wine will yer be having with those socks