“Bernie the Faust,” William Tenn, 1963 – A man is approached by a mysterious man who proposes that he buy a twenty dollar bill from him for five dollars. Although he suspects a scam, he’s intrigued. The man is revealed to be an alien with a plan to purchase Earth.
Comments: Read in The Future I.
Author: Wikipedia: “William Tenn was the pseudonym of Philip Klass (May 9, 1920 – February 7, 2010), a British-born American science fiction author, notable for many stories with satirical elements.” See Matthew Cheney’s review of Tenn’s fiction.