https://phys.org/news/2018-07-giant-sale-neil-armstrong-auction.html

The collection includes a variety of artifacts from Armstrong's 1969 lunar landing and private mementos that include pieces of a wing and propeller from the 1903 Wright Brothers Flyer that the astronaut took with him to the moon.

Other items that went to the moon with Armstrong include a U.S. flag, the largest size typically flown during Apollo missions; a United Nations flag; various state flags; and some Robbins Medallions. The sterling silver medallions were paid for by the crews of Apollo missions and were available for purchase only by NASA astronauts. Armstrong's collection also includes a rare gold medallion.