A 1928 poster of Disney cartoon character Mickey Mouse sold for more than $100,000 at a Texas auction, the auction house said. Heritage Auctions said the color poster, an advertisement for a \"Mickey Mouse Sound Cartoon,\" is one of the earliest surviving images of the iconic character, ABC News reported Friday. WENN.com said the poster sold for $101,575 to an unidentified buyer. Grey Smith, director of movie poster auctions at Heritage Auctions, described the piece as \"an important piece of pop culture treasure.\"