Dark web markets absolutely still exist. The traceability problem is at least partially solved using mixers. I don't know everything there is to know here, like how easy it is to get back fiat.
The markets get busted (or become scams), the dealers not so much. If you’re on these markets regularly for years you’re probably communicating directly with sellers at this point.
It's so incredibly traceable these days and every iteration of Silk Road gets busted, no?