BLOOMINGTON, Ind. (AP): Turnstiles used at Indiana University’s Assembly Hall are being auctioned off starting this month.

The 24 turnstiles used to mark attendance at basketball games and other events are being auctioned through the Indiana University Surplus Stores. Bids start at $500, and proceeds go to the Surplus Stores and the university’s athletic department. The first sale ends Thursday.

The Herald-Times reports the turnstiles were first used at football games at Memorial Stadium before being moved to Assembly Hall when it opened in 1971. The red-and-chrome turnstiles remained at the fieldhouse until 2014.

University-owned property is disposed of through the Surplus Stores.