Co-Broker Agreement as Buyer and Broker

[Kate B.]

I thought I read something about this before, but a search didn't bring it up.

On St. Patrick's Day, I learned I got my license as an independent real estate broker in NY.  It took 5 days because I am a lawyer.   I am now looking at properties in NY for a new primary home -- looking only at 4 plexes right now, and living in one unit.   I have not taken the time of any real estate agents, so I am not leaving anyone unpaid.  I have only sent brief emails to listing agents.   My question is when do I bring up the subject of a co-broker agreement?  I have narrowed my current choices to two properties about 35 minutes apart.  Should I include requiring a co-broker agreement before I submit an offer, when I submit it, or what?   My gut says sooner, in case there is an issue I will just skip that property.  For example, I want to see the properties, and I wonder how to manage that.

Thanks!

Kate