Hi
What agency would you suggest for a person with very little acting experience to send their head shot?
Only background & some classes, In the Ross report there are agencys & casting directors
this person is in NY
would do print, commercial whatever

no, really who should i send to?

Just don't do it. The only agencies interested in someone that new (unless they're very young) would probably be interested for the wrong reasons (selling them services, etc.)

Answer ads in Backstage every week, get indie and student film credits, do small plays etc.

If all this sounds like too much effort, frankly, you're in the wrong field.

Otherwise, once you've established that you really are an actor, who really wants to DO this, not just make money at it, then you can try and find an agent who will take someone with those kinds of credits. And even that's hard (though it worked for me, both in NYC and LA).