Have you checked out the new Auction feature in the Armory yet?
⚓Each auction = limited duration / # of winners
⚓Use various in-game resources as your bid
⚓Prize(s) will be credited to the highest bidder at the end of the duration
⚓Receive resources back if you don't win http://pbs.twimg.com/media/E2pV423WUAgIU3e.jpg