1943 steel cent

A gray wheat cent dated 1943 is the wartime steel issue, made when copper was needed for the war, and a fridge magnet will grab it. It is the long shot on this list: the Mint gathered up and destroyed large numbers after they circulated into the 1960s, so most turn up in old jars and inherited tins rather than today's change. Ignore the viral posts about a fortune, though. The valuable 1943 cents are the rare copper strikes, and a copper-colored 1943 that sticks to a magnet is a plated steel cent, not one of them.