
You can't build a drug empire on your own in Schedule 1, and that's where dealers come into play. As you grow your network of contacts throughout Hyland Point, some of your customers will put you into contact with dealers that will automatically sell your product for you in exchange for a cut of the profits.
Although it seems simple on the surface, the dealer mechanics in Schedule 1 are actually quite complex. You can miss out on a ton of cash if you mismanage your network of dealers, so assigning the right customers and keeping your dealers supplied with the right mixture of drugs is paramount to success.