The voice actors were recorded on August 22, 1986.
This is the first script written by Michael Edens. He wrote it in two days.
Norteby's was originally spelled Northeby's, likely a reference to the famous auction house Southeby's.
Amongst the other bidders at the auction of the Codex of Theophilus at Northeby's, there can be seen stylized caricatures of Paul Shaffer and of Indiana Jones.
Peter Venkman and Ray Stantz were aiming to purchase a copy of Benz and Franck's "The Ectoplasmic Gourmet" at the rare book auction.