I would think that the powder thing would be illegal, not being in a container that is approved for it.
It is also very dangerous since once out of the bottle , it is not always easy to identify by people, employees, not familiar with each powder. It is easily mixed up as well, and could be packaged wrong, and the buyer, if a new reloader, could use data for one powder and wind up destroying their gun, or their lives.
I don't have a problem with breaking down the bullets and selling them. I've thought of doing it myself, but in 100rd packages. Winchester bulk, 100 rounds, for $10. They'd sell like hotcakes. I don't care if someone charges $1000 for 100 of them, it's a free market, and the market will dictate whether they sell or not, and if not, then the price will have to be lowered. As far as limiting the number sold to each person, that is a reflection that they are asking a reasonable price and are having to limit the sales in order to keep merchandise. That limit would be lifted were it not.
Personally, I would make a phone call about the powder, you may save some unsuspecting noob reloader from a world of hurt.