I think many people get into brokering businesses because they think it is easy, lucrative and simply requires introducing a buyer to a seller. This is especially true in “hot” markets. I think you are fine to keep these people in your network as you never know who they might connect you with. As others have stated, just be mindful of the fact that they are likely not going to provide you with the information you need - meaning more work for you, and may not be able to help a seller understand a good, sound offer, when it is presented.

I’d focus more on the quality of the target company than on their broker. Yes, an experienced broker can definitely facilitate the deal process and an experienced one can detract, but your ultimate goal is to find a great business.