[Retric]

The problem is this forces everyone to know the market really well. That's one thing for a recruiter but as actual salaries are often hidden it's a serious information assemitry for most people. And many people especially women really undervalue their skills.

Most people are much better off to simply ask salary ranges as the first question for a recruiter. Don't put it off and don't waste any time. Approximate location should the next question as again it minimizes wasted effort.