A 2008 article published in USA Today reported that the process for manufacturing campaign buttons was patented in 1894, 34 years after this button featuring Abraham Lincoln and his running mate, Hannibal Hamlin, was produced. The value of a campaign button doesn't necessarily rely on whose face is featured on it but rather on scarcity. The fewer of a specific type of campaign button that were made, the higher price it can fetch at an auction house. (George Eastman House/Getty Images)