Actually, there was a company, can't remember the name, that tried to market plastic broad heads back in the late '60's early '70's. Didn't go over too good.

I'd have two questions:

1 Are they legal?
2 What happens when/if you hit bone?

The price is right though. Says there not available yet, or out of stock, or some such. Good company, I'll probably get some to play around with, not sure I'd hunt big game with them until they've been proven.