A copy of the first issue of Action Comics, featuring Supermans debut, has become the worlds most expensive comic, fetching $2.16m (1.4m). It was auctioned online for a starting bid of just $1, with a reserve price of $900,000. The buyer or sellers name was not disclosed, but there is speculation it was owned by actor Nicolas Cage. It is the first time a comic book has broken the $2m barrier. The issue was published in 1938 and cost 10 cents. About 100 copies of Action Comics No 1 are thought to be in existence, and only a handful of those are in good condition. Another copy of the same issue sold for a then record-breaking $1.5m in March last year. But that one was not in as good condition as the copy that sold on Wednesday through New York-based ComicConnect. BBC