There was an episode of “WKRP in Cincinnati” where they were trying to get rid of a preacher named Little Ed (a 300 pound former professional wrestler) who did a Sunday morning program on the station. It seems he was making a lot of money selling things like “John the Baptist shower curtains” and “Last Supper steak knives.”
One of my coworkers at the time was a radio enthusiast. He brought up a "border radio" type that was selling autographed pictures of Jesus Christ.