OK, now I'm curious. How does darknet stuff actually work?

Is there some darknet search engine that you access over Tor and type whatever illegal thing you seek such as "child porn" or "stolen credit cards" or "heroin" or "money laundering" into and it points you to providers of those illegal goods and services reachable over some reasonably secure channel?

Or is it one of those things where someone already using a particular child porn or stolen card or money laundering or heroin selling site has to put you in contact with them?

Hmm. Tor onion addresses are generally super long and have a large random element to them, such as

facebookwkhpilnemxj7asaniu7vnjj.onion

where the "Facebook" part is there for convenience and may likely not be present for actual illegal addresses. As such, you probably won't be able to find a CP website unless you actively brute force the entire onion address space.

I don't know how the sharing actually happens, but I don't think a real search engine for the dark net exists. There are websites that try (Ahlia, I think?) but they are super limited in scope.

I suspect addresses for drugs and CP are shared person-to-person.

dark.fail indexes darknet markets, but all the ones I've seen ban CSAM