What are your fees?
My fees range from $110/session to $150/session. Clients choose the fee they feel they can afford to pay. People who can afford more support those who can afford less.

Why leave the amount of payment up to them?
I leave everything else up to them. Why not the fee?

Don't clients find this way of setting fees a little unsetteling?
At times, and usually when they are struggeling with how much they can afford as compared to how much they want to afford. However, that is an issue for them.

How do you feel when you know they could pay more but are choosing to pay less?
This is not an issue for me. A am not attached to any aspect of their decision. I accept it unconditionally.