In this Vickrey auction, 3 players bid for an object with private values. Each player can only submit one bid. See: Vickrey, William. "Counterspeculation, auctions, and competitive ' sealed tenders." The Journal of finance 16.1 (1961): 8-37.
This application provides a webpage instructing participants how to get paid. Examples are given for the lab and Amazon Mechanical Turk (AMT).