Per today's news the state of Florida received reccently a letter for voting in absence. The stamp on the envelope was Inverted Jenny!! The inverted Jenny (or Jenny Invert) is a United States postage stamp of 1918 in which the image of the Curtiss JN-4 airplane in the center of the design was accidentally printed upside-down. Only 100 of the inverts were ever found, making this error one of the most prized in all philately; as of 2003, an inverted Jenny would typically sell for around US$150,000. According to today's market value it is about half million US$$!!
The voter never inked his/her name so the vote was invalid.