I'm looking to buy a used Super Soco TC. I'm talking to a few sellers, model years 2018-2021 and mileage between 1000 and 20000km.

What should I look for on the bikes? Any common issues? What is the expected battery life (in km)? I.e. what would be the health of the battery of the 20000km bike? Any model years that are better or worse than others?

None of them have been driven faster than 45km/h as that is the speed limit for these bikes in my country.

Thanks!