Silliest Saturday! TIME Traveling Salesmen

This is an idea for a TV show. So, this man travels through time selling more time! Like more time to do things and to live. Except he isn't a very good salesmen. The point of the story, is that he tries to explanation the benefits of living longer, and he travels to different times but in chemical order. The point is that, he is attempting to sell portions of of his immortality, so that he can die!