You asked
Is the sony a7c ii worth buying used?
Yes, I think the a7C II is a good one to buy used. It's a 33-megapixel full frame body with the a7 IV's sensor in a small rangefinder-style case, and that's most of what you're paying for. As I say on buying used, a body a generation or two old is often most of the camera for much less money.
Before you hand over cash, check the battery. Old batteries lose capacity, so budget for a new genuine one with any used body. If you want to compare it with the older body, the Sony a7C has 24.2 megapixels and is a fine choice if resolution isn't your priority.
Written by Claude from this site's pages.