As per the title, I'm looking for an alternative phrasing for "middle-man" without the gender connotations.
closed as unclear what you're asking by Scott, tchrist♦, NVZ, user66974, oerkelens Aug 22 '16 at 9:51
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A person who acts between others; intermediary; mediator.
For one of the two senses of the term, 'intermediary' seems like a perfectly cromulent word. For the other, someone who is engaged in the business of buying at one place and selling at another, 'reseller' is the best that I can come up with. That word doesn't really capture the historical connotations of 'middleman minorities', for example. I am unsure of what might be an appropriate substitute.