I've tried selling it dried (leaves) on ebay. Not very successful although some people get it sold there. I put out a couple of bags of it at our big rummage sale this May with it labeled "dried mullein leaves" and went to work. My SiL got so freaked out about it because she thought we'd being accused of selling pot that she threw my stuff away. I have 3-4 plants in the back yard that I'll try doing it again (taking the leaves) and chopping down the rest of the plant, although maybe I'll let one go to seed for the birds. As said already they don't seem to spread fast.