So trying to get slightly more minimalist before I move - I know these both count as accessories, but how many of these do people have/keep?

It depends on if you wear both often or not. Keep the ones you really love. They don't take up much space and can change an outfit from something boring to exciting depending on the situation.

Like Lily said, it really depends on whether you wear them! I don't wear belts often, so I only have about 4 of them. But I love scarves and am always looking for more. Currently I have about 6-8 lighter-weight scarves and as many again for wearing outside in the winter. (In my climate, scarves are practical at least 8 months of the year.)

So helpful to see other's thoughts on belts and scarves!