The Vader Project put 100 defective Master Replica ROTS Darth Vader into the hands of 100 of the hottest underground and pop surrealist artists and designers working today. The exhibit toured the world from 2007 until 2010. After the it came to an end, most of the helmets were put up for auction and made their way to private collections. Two of the Vader Project helmets, both of which were added to the exhibit exclusively at Celebration Europe, have found their way to eBay. Follow the above link to check them out.