When I had the hobby stall I ran into old collectors all the time. Couple I managed to get re-interested in the hobby again.
But like with Internet, cheaper market overseas made it hard for me even renting a small stall.
I had my regulars like yourself Biggie and my passion for the hobby. Some Sundays I would only make about $50-80 profit and that involved getting up before 5am and finishing at 1-2pm after i unloaded. People will always say they will support locals but $$$ do talk.
I would love to open up a full time hobby store but prob need another 30-50 regulars to make it viable. I do miss the market stall but not the early get-ups.
I will be running a few more case breaks and trade days in future so hobbyists can catch up with each other in Adelaide.