How Much is a Wookie Head Worth? $172,200

A Chewbacca headpiece used in the original Star Wars trilogy sold for $172,200 ($140,000 plus $32,200 buyer's premium) at a Profiles in History auction.

The item also included signed photographs from Peter Mayhew, who played Chewbacca, and Stuart Freeborn, who designed the costume.Profiles described it as a the finest "screen correct" Chewbacca headpiece in private hands. It comprises a screen-used full-head cowl finished with period-made facial pieces, such as the front jaw, nose, teeth and tongue.

Other Star Wars items realizing high prices included a screen-used blaster rifle from the first Star Wars movie, which sold for $104,550 ($85,000 plus buyer's premium of $19,550).

It is the first blaster ever offered for public sale that appeared on film. This particular model is one of two made with a Bakelite stock like the one used in the scene in which Chewbacca helps break Princess Leia out of jail (though it is unknown if this is the one used by the Wookie).
Some collector also snapped up the original concept art for the famous poster used in the first Star Wars movie for $73,800 ($60,000 plus $13,800 for the buyer's premium).

The poster was drawn by Tom Jung, who worked for the advertising agency Smolen, Smith and Connolly and already was already well known for his work on the Dr. Zhivago poster.
Jung called the famous image of the cross formed by Skywalker's sword in front of a ghosted image a good illustration of the movie's good versus evil theme.
See the art below.
via HollywoodReporter.com