A lightsaber used by Darth Vader in “The Empire Strikes Back” is set to be auctioned on Nov. 12. Heritage Auctions will host the event, featuring this iconic prop from the famous duel where Vader reveals he is Luke Skywalker's father. The saber, also used in “Return of the Jedi,” is expected to fetch at least $1 million. It is part of a collection of 28 lightsaber props spanning the “Star Wars” saga. Other items include Obi-Wan Kenobi and Anakin Skywalker's dueling sabers, Boba Fett's blaster, and a Yoda puppet hand. The auction promises to be a major event for fans.