Phedka/Jardonerre
are, indisputably, the best delivery destinations for a lot of this stuff though - if EDDB/INARA is to be believed, at least.
Funny thing with regard to the actual
mining sites, though, is that a lot of people (according to their screenies, at least) don't seem to have realised it's smart to find a mining site close to a lucrative delivery port.

The main reason I went to so much effort with my mining "operation", when I set it up, was so that I could have "prospector" ships to scout likely mining sites, then move my T10 to do the heavy-work, return to a local station and, finally, swap the cargo into a heavily armed/armored Python so I could transport it to market
anywhere safely.
The idea of flying a
mining ship half way across the bubble to a delivery market seems like a perilous and long-winded one to me. [where is it]
Course, if you're doing it in Solo, probably not so much.