The Beatles' famous psychedelic Bentley had no takers at this week's auction at Christie's East, but a 90-page script for "Citizen Kane" went for $231,000, the highest figure ever paid for an entertainment item at auction. (The previous high was $165,000 for the ruby slippers from "The Wizard of Oz.") The bidding on the 1956 Bentley opened at $300,000 but there was not a single bid. Screenwriter Herman J. Mankiewicz's personal copy of the Oscar-winning "Citizen Kane" script, on the other hand, was fiercely fought over by the packed crowd. It was purchased by an anonymous client represented by a New York-based art firm. The script is rare because it contains comments written in the margins by lawyers for William Randolph Hearst, on whose life the movie was loosely based.