Robinson said "it's not all that unusual" for someone to try to sell a piece of the moon.
Twice a year, the space agency's inspector general's office issues a report outlining what space trinkets were found on the black market. A recent report detailed the recovery of two rocket motors from the Apollo missions that put man on the moon; the motors were on sale on the Internet.
Astronauts who landed on the moon collected 2,415 samples of moon rocks weighing a total of 842 pounds. Most of these rocks were collected during the Apollo 15, 16 and 17 missions. In addition, three unmanned Soviet Luna spacecraft brought 0.66 pounds of lunar samples back to Earth, according to NASA's website.