LOS ANGELES (REUTERS.- Superman and Batman’s first appearances in comic books have each set auction sales records and broken the $1 million barrier, in an age when traditional investments have fared badly and superheroes look attractive. A 1939 comic with the first ever appearance of masked crime fighter Batman sold at auction in Dallas on Thursday for a record $1.075 million, said Heritage Auction Galleries. Three days earlier, a buyer paid $1 million for Superman’s world debut in Action Comics #1, more than tripling the previous comic book sales record set last year. Shirrel Rhoades, former publisher and executive vice president of Marvel Comics, said high sales for those comics is partly a reflection on the poor economy. “When the stock