Todd Andrlik became a newspaper collector by chance. It happened at a bookstore in Galena, Ill., where he came across a copy of an old newspaper declaring President Abraham Lincoln dead. “I was reading the first draft of history about the assassination of Abraham Lincoln and the reward for the capture of his conspirators,” Andrlik said. “It triggered in me this intense passion and enthusiasm in history that I previously hadn’t had.” From there, Andrlik said he went around the country searching for old newspapers and found many from 18th-century colonial America. These newspapers inspired Andrlik, a marketing-media professional by...