Has anyone commenting ever actually bought or sold drugs before? Every single dealer or customer I've ever met has been through someone else, or someone I knew. There's relationships and trust vouching, just like any business. Credit is extended, and paid back. Transactions generally occur in homes or cars.
The comments here are acting like all real world drug market transactions occur between strangers, which is so far removed from the truth we might as well be talking about something else.
A good way to describe selling weed is 'the only MLM where people actually want what you're selling'