More than likely, you will subsidizing that person's trip and nothing will come of it. A true shopping deal will pay the person out of future royalties from the deal they secure for you. If someone shops your tape and gets a record label to sign you, they will want a percentage of the income from the record deal. This is standard. What varies is the percentage.
Some people are scrupulous and take only what is fair.
Others over-reach and rip bands off. This is over-reaching and not standard in the industry. The other option, and one I prefer, is to offer them a point or two on the record contract. A point is a percentage point. Offer the person shopping your tape one to three points.