Book~The Crane's Gift~

I know the story as "tsuru no ongaeshi" in Japanese. One Crane give her feathers to a old man who help her when she was hurt by traps.

I think the story says "if you do a good thing for someome you will be done a good thing". I understand the point. But I cannot understand one point. That is that a man sold beautiful clothes made by the Crane. If I were a man I would not sell or give her clothes because it was very beautiful and she made them FOR US!!(my wife and I)