An auction of this letter just failed to reach its minimum of 22,000 Euro (almost $25,000). The astronauts of Apollo 15 Davis Scott, Alfred Worden and James Irwin took 100 letters to the moon and back and then sold them to a dealer in Germany. The whole matter was not authorized and created a scandal. The FBI visited the stamp dealer in Germany and the 3 astronauts were barred from flying again. We know where one of the letters is, but where are the other 99 and how much do you think these are worth?