Seats are bought and sold via CBOE's Membership Department using an auction method in which bids and offers are submitted to the Exchange on an "as-desired" basis. When a bid matches an offer, a sale is made.
CBOE, the world's largest options marketplace and the creator of listed options, is regulated by the SEC. For additional information about the CBOE and its products, access the CBOE website at: http://www.cboe.com/