My take on the demand for special runs is that there is a limited market of people that will spend over $300 on a high quality, high functional, proprietary technology, general purpose flashlight.
The majority of that market likely already has one or more HDS flashlights. So the question is how different is the special run from the previously available HDS lights. Bare aluminum is a color not a special metal run. Copper will be very successful, NAT not so much unless it looks really cool compared to the last aluminum run because it is a color choice, not a special metal. (If I understand the NAT offering - it is aluminum, right?)
I do not think price is much of an issue with this market and may only bring very few new HDS customers into the fold.