https://en.wikipedia.org/wiki/The_Market_for_Lemons
"until this point, we didn't even talk about money"
Big mistake. For years I was desperate for a job (STEM PhD). Now it would be my first question to ask. And I ask this on the phone before I would even bother to go for an interview. But again, now I don't need your shitty job. Chances are, you need me more than I need you.
I remember when I talk to a company once on the phone. Besides that I did not really like the salary, I realized I would not be able to do the job since it was basically two jobs and their chances of success were much slimmer then they were assuming. Didn't bother to go on. But the HR guy said, please apply, worst thing that can happen is that we don't hire you. WRONG. Worst thing that can happen is that I get treated disrespectful in an interview and that I waste time. Most companies value your time with zero.
And if you applied already you ask in the first phone interview why they think you are suited for the job. You would be surprised how many people have you come in without ever having looked at your resume and then tell you that you are not a good fit based on your resume in the interview. It is basically the first time they look at it.