Speaking as a vendor, people can buy entire rigged figures for $10 or so, complete with morphs and textures.

Vanishing Point has had an entire gemran outfit with a helmet free for years.

A helmet alone just won't sell at all for $7 in today;s poser market.

Maybe offer a few different texture sets with it, and add more german gear to create a marketable product?

 

Way too many people take way too many things way too seriously.