An 11-foot piece of film from the "Mirror, Mirror" episode of the original Star Trek series is currently up for sale on eBay.
Here's a quote from the description of the item: "This is a unique, one-of-a-kind item. I was an assistant film editor on the original series of Star Trek and this is an original section of film that came right out of the camera after shooting. This is from the episode "Mirror, Mirror" which aired October 6, 1967. The clipping is 11 feet 7 frames long, about 183 frames total. Pictured on the film is Chekov (Walter Koenig) when he is foiled in his attempt to kill Captain Kirk. The clip follows the fight sequence and includes two different phaser blasts which were hand scribed by me back in 1969. This is a work print used for editing and special effects."
The auction ends Friday evening. Starting bid was $500 and its currently up to $666. Someone rich should buy this and donate it to the Handsome Genius Club Museum of Cool Stuff.