What's an autograph of the world's most vilified man worth? About $65,000, apparently. An unidentified American bought a two-volume set of Mein Kampf signed by Hitler himself at auction in Los Angeles this week, reports the BBC. That's about three times the expected price, notes Time. Hitler inscribed both books—a first-edition from 1925 and a second-edition from 1926—to future SS officer Josef Bauer. It's "heinous," says Nate Sanders, owner of the auction house, but it's "a piece of history." (Click to read about how Mein Kampf has been a strong seller in the e-book market.)