Also note that you can dry and keep the entire pollen sack. No need for it to reach full bloom. Just dry it out in the same way just before peak ripeness. That would make packaging, shipping, and selling considerably easier. Not sure about the legalities but I can't see why it would be different than selling seeds. I don't see a huge market, though I would certainly like to have some around so that I could reap seeds from a few buds on each grow.