Herbs and Roots

So it has come to my attention that people will pay for things like pokeweed root and sassafras leaves.....anybody collect herbs and roots for profit? I already knew about the ginseng and more valuable herbs but was unaware of the many other plants that are used. Anybody know of a buyer?

I watched a few videos featuring Michael Pilarski. Seems like he's one of those pulling this concept off. Would be cool to hear from him