The photographs were taken by British mountaineer Eric Earle Shipton when he was leading an expedition on Mount Everest in 1951.
He believed that the footprints might belong to a bipedal creature known as the Yeti.
The photos sparked debate about the existence of Yeti, according to Christie's, the auction house handling the online sale.
Four of Shipton's 12-inch by 13-inch photographs will be sold to the highest bidder in a two-week-long online auction that began on August 27.
Also Read
The other two photos give the viewer a better sense of the scale of these enigmatic prints - showing the Yeti footprint next to an ice axe and a booted foot, respectively.
The photos could fetch up to USD 8,300, according to Christie's.
Other highlights from the "Out of the Ordinary: The Online Edit" auction include a fragment of the Bible that accompanied American astronaut Edgar D Mitchell to the Moon during the Apollo 14 mission in February 1971.
The specimen could sell for USD 16,500, according to the auction house.