I'd say westerfields helmet should be 75 dollars without visor, the thickness of plastic they use, and the ammount isnt worth over 100 dollars, about a year ago, I purchased .90 abs for 30 dollars, it was enough vacuum form a ton of crap, if I did helmets I could have made say.....3-4 stormtrooper helmets.
But then again remember, it is a kit meaning it is pre "worked" to make it easier for you to assemble, so that does add more money because unlike stormtrooper armor, the kits come pre cut and ready to assemble.
but I'd still say for 125 dollars of my own money, I wouldnt buy it unless it was painted and included a gold 1 layer visor. I'd rather spend the money on a sb helmet for a little more, then buy my own gold visor and have a helmet which is show case quality. But liek sigma and sean said again "armor before attitude" and armopr is better than no armor, helmet is better than no helmet.