Pop quiz, hotshot: Your best friend is having a "Star Wars"-themed costume party, and you want your Luke Skywalker costume to be really, really authentic. How much is it worth to you to know you've got exactly the right pair of pants? $36,000, perhaps? Well, someone believes Luke's pants are worth that much, and they've written the check to prove it. Nate D. Sanders, an online auction house, sold the off-white cotton pants Mark Hamill wore as Luke in the original 1977 "Star Wars" to an unnamed bidder Wednesday for $36,100, as part of a sale devoted to Hollywood collectables.