I barely qualify for this group. Three of my four Bronicas are the new ones (ETRs, SQ-A, GS-1) but I also have an old C that I got for next to nothing. It has produced some rather nice results and just yesterday I found a second lens for it. I already had the 75 and now I'm a proud owner of the 200!
Here is some of the stuff I've shot with the 75mm.