Apollo 11 Checklist

Buzz Aldrin used the list—complete with handwritten notes—in preparation for his flight home from the moon. Est. price: $35,000–45,000

Apollo 12 Module Strap 

Still covered in moon dust, this strap held equipment in place on Intrepid, the second manned lunar lander. $25,000–35,000

Scale Model Of Lunar Rover

An aerospace company built this 1:7 model of Lunokhod 2, a Russian rover that roamed the moon in 1973. $10,000–15,000

Spacesuit From The ’60s 

The pressure suit dates to Project Mercury, the first U.S. human spaceflight program. $8,000–12,000

This article originally appeared in the April 2014 issue of Popular Science.