I can comment on the Bronica S2A. I got one in 1971 through a military base exchange at a great price. I had the Nikkor 80mm and Zenzanon 150mm lenses. I never had a problem and the lenses were very sharp. I used it for nineteen years an sold them for what I originally paid. Then bought Hasselblads. The point is that you would be getting a camera that is approximately forty or so years old so I would be cautious about the camera's history, condition and if parts are available should a repair is necessary. Also when buying used equipment I only buy equipment I can check out first and from a seller that has a good return policy.