That’s the downside of all the AI’s good work putting Imperial Corporations in power wherever we go:- Those corporates shut down black markets in stations they control 🙁
When I was starting out, I made a fair bit of extra cash by:
(1) Getting friendly or better status with controlling faction of main stations I was trading at in my ‘home’ group of systems. I’d try to pick a couple of main stations on the basis of them having a black market. Being on friendly or Allied terms means much less scans.
(2) Picking up salvage missions from the BBS
(3) Taking on extra salvage: more than what I needed for the mission, plus any random stuff I came across – especially artefacts, trade data, stolen tech
(4) Sell the extra salvage on the black market
Oi! That's Baron von Schnellenstein to you, mate. No, it doesn't matter that I'm an Imperial Prince!