Not to disrespect Dan at all, but in my brief interaction with him yesterday, I got the impression that age is having some effect on him. According to a boothmate, he was late yesterday because he had to go back home for some type of issue. And he was out of his booth quite a bit once there.
So I don’t know if he was distracted from the day, having memory issues, or a combination of both... Maybe he quoted you the wrong price first, maybe when you came back. I’d say ask again today and see what price you get if it’s still there, then let the situation end regardless.