Geez at that rate, you may just want to buy a Shepperton Design helmet....At least they were the original makers!
Go for it and while you may be happy with it for now once you start to become more intamate with the stormtrooper form and shape you will realize that you've just shelled out big dollars for a huge lump of turd. And he wasn't the original maker. Original vac former maybe but the guy couldnt sculpt his way out of a paper bag. :lol
Ben