How do agile negotiators start highr or do they start low? I ask for much more than I expect the other side to give, in order to leave room for concessions later on$.$

I estimate what the other side can give and ask for a little less than that, so that they are satisfied.

I try to propose a deal that would be fair to both of us$.$

I consider where I would be without a deal and then ask for something better than that.