Weapon valued up to $3m and items from movies including Alien and Armageddon for sale in three-day online auction

Iconic movie props from a galaxy far, far away, and from a search for the Holy Grail much closer to home, are for sale in a blockbuster auction in California featuring a trove of silver screen history.

Darth Vader’s lightsaber from the final two films of the original Star Wars trilogy is the most valuable lot in the three-day online auction hosted by Propstore, a Los Angeles company specializing in movie memorabilia.

The weapon, wielded to devastating effect by Vader, the Dark Lord of the Sith, in the films The Empire Strikes Back (1980) and Return of the Jedi (1983), is valued at up to $3m. It is worn and has several dings and imperfections, which Propstore said enhances its authenticity and value.

The company said it is believed to be “the only hero lightsaber prop with verifiable screen-use to ever be offered at public auction” and “one of the rarest and most sought after Star Wars props in existence”.