From what I remember in the podcasts, he doesn't
sell anything. To avoid all the bizarre regulations and frustrations of expensive licenses, he charges a feet to come onto the property. While there, you are free to gather up whatever you like to take home with you. That can mean baskets of produce or nothing at all. In much the same way some prohibition era locations would sell something unrelated and offer a free drink with every purchase, so too does Sepp do. At least as I understood it.