It can buy you Beatles memorabilia. When once Beatles manager Brian Epstein signed a contract with the band on October 1, 1962, he became entitled to 25 percent of the band’s gross earnings. Next month that document will be up for auction in London. It’s being put up for sale by a businessman from northern England who collects pop memorabilia. The contract could raise as much as $476,000. The auction will also include the piano used by the Beatles to record “Hey Jude,” which could fetch as much as $800,000.