Equity agrement with real estate broker?

A real estate broker recently offered my partner to send deals our way for a 20% partnership interest in the deal.  He would waive (or ignore) the commission and we can consider it his "investment" in the transaction.  What do you all think about this "offer"?  What kind of "finders fees" or offers have you encountered?  Man, I'm just looking for reputable brokers that are willing to help and make money on commissions.  Perhaps down the line once a relationship is established an equity deal could be worked out, but off the bat.  On the first meeting!?  Seems a bit shady.  Curious to hear your thoughts.

Thanks