Here is the proof that collecting comics can make you rich. The New York Daily News reports that this Sunday the first issue of Action Comics was sold in an Internet auction for 317,200$. The importance of this particularly comic book lies in the fact that it features the first appearance of Superman the Man of Steel and his alter ego Clark Kent. Only aroud 100 copies of this issue are still in existence, so check your attick and hope your grandfather was a collector too. Source