Here in Vancouver we had Lens and Shutter. In the 70's and 80's they had a round display case with Horst Haberstroh in the center. Every saturday it would be packed with people, discussing cameras, film and whatever. They even had an ashtray on the counter! As Horst was a fervent Leica (and occasional Zeiss) advocate, the round display case was commonly known as "Fantasy Island". Things were traded, sold and bought. If there was a lens you wanted to try out, Horst would hand it to you and you went outside and shot a roll. With bl/w I used to have him put it aside and go home and soup the film, check the negs and go back and,usually, say "Ok, I take it!".
I know that economics today precludes this kind of store. Now it is all digital, memory-cards and gadget-bags and a small section of basic, very basic, darkroom supplies! Virtually no used film stuff and occasionally they dont even have Tri X in stock!
You could phone them from some remote location "OK, I need a Hassy SWC, 3 A16 backs and 50 rolls of EK 160. Have someone take it to the south airport and give it to the pilot of this corporate aircraft and put it all on my account!".
You learned more in a couple of hours around "fantasy Island" than you could reading manuals and "How To's". You had a technical problem, you asked and somebody would know what to do. You needed a gadget for a shoot, someone would go "Here, take mine - dont need it right now".
So, E bay and classifieds are most likely cheaper, but I miss this interaction between photographers (amateurs and pro's alike) and the education that this provided.