I would tell him, if possible, before I even relay the info to the third party. Maybe he's never been asked for a speaking honorarium, and didn't know what to request, LOL. He should've asked somebody, though.
I was at a friend's church last night, because they had a visitor who happens to be the brother of their MOM. He was out here from NC for Thanksgiving, and they wanted him to speak. I think that not having heard him before, the pastor opted for a special service on Tuesday night as opposed to Sunday Morning, lol. This man preached! The word was so, so, on time, revelatory, powerful... it was just wow. The guy didn't ask for anything, as far as he was concerned, he was up here to visit his sister and nieces/nephews, and given the opportunity, he was ready to share the word. At the end of the service, the pastor gave him a 500.00 gift. It was so awesome. He specifically said it was because he didn't come looking for anything and showed a genuine interest in the church being blessed and helped more than anything else. $500 for a tuesday night, sparsely attended service? Look at God. If he would've asked for anything it surely would've been significantly lower than what he actually got.