I have bought a few things for my father's greenhouse and garden. Often the quantities are quite large, as people in Ireland will usually have a good bit more land around the house than you'll get over here and various neighbours often get involved in a bulk order, etc.
My recent purchase history has very clearly flagged me up to several different suppliers as a potential operator of an illegal cannabis grow-house.
The stuff that is popping up here now is often the sort of thing that people rarely buy in their own name, I suspect...