I respect they are "things" (widely used things even), but I think the best shot is as you just pointed out is contacting large producers of this stuff, and see if they want to own them. Generally speaking, producers that know the benefits of owning certain domains, associated with the products they sell for their online
If you attract interest (hypothetically speaking), an offer in the thousands wouldn't be unreasonable. However, If you don't attract that interest ...drop (but go for it, hope you do)