Since I am now old enough that all the people I bought weed from 50 years ago are dead of old age, I use the so-called dark web to get cannabis. I can get a home delivery quicker than Tesco. The park nearest my house has lovely wee 4 inch (10cm for you youngsters) stickers with nice pictures of a cannabis leaf, and a QR code. Same-day delivery. I note that rival 'gangs' tear off or obliterate the QR code and substitute their own.
The occasional exit scam is less overhead than the time and money one used to spend chasing down a dealer. Quality and weight much better than the 'old days'.