I wanted one as well but when I changed my mind when I looked at the price. I can't remember how much one costs but surely since my butterfly plastic/leather one costs ~$180 (typical Prada price for a piece of junk plastic, LOL), the robot one with all the electrical spare parts for the arms and legs must surely come to $300 - I give up ...
oooh the huge one? it was £120-140 or something like that, i really wanted it but i couldn't justify it and now it's nowhere to be found not even on yoox.. the one i wanted was enormous!