When I sense I'm being informationally interviewed by a recruiter or discussing a job I realize I'm not interested in I offer up high salary expectations to push up the overall pay expectations for filling the position.

I kind of figure the market knows what my skill set is valued at and gambling for an outsized payout isn't likely to work unless you're interviewing at the top tier. When discussing a job I am interested in taking I push my tier to the upper end but leave room for discussion.