Simson buying advice?

Hello everyone🙋🏻‍♂️ I've been thinking about getting a Simson for a while, but I can't really decide. I'm torn between Sr50, Schwalbe or S51. Which of the three has which advantages and disadvantages? Is there anything you should pay particular attention to when viewing the property? I also saw online that Simsonrausch and Areas51 offer…