A prototype stormtrooper helmet made for Star Wars: A New Hope is featured in an auction at Nate D Sanders with a minimum bid of $5,000.
It was designed by Andrew Ainsworth in 1976 and is one of six test-pieces, which feature a unique ribbed edge that was not included in the final design.
A spokesman for Nate D Sanders told the Daily Mail: "The prototypes were a work in progress and show the evolution of the stormtrooper helmet.
"Our estimate is very conservative - it could easily go for $20,000 or more. Star Wars collectors are a very passionate bunch and they are often willing to pay big bucks for original items of memorabilia, especially something as rare as this."
We have this piece of Krayt dragon bone from the first Star Wars film available.
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