Have any sports memorabilia laying around your house? How about old books or comic books? Before you clean out your attic, you may want to check out the value. A copy of Action comics #1 with the first appearance of Superman, for instance, sold for $3.2 million a few years ago. In addition, a hardcover first edition of “Harry Potter and the Chamber of Secrets” is valued around $7,000, according to Sotheby’s. Are you a sports fan? You may be interested in knowing that a Nick Foles bobblehead doll increased in value from $30 to $300 after the Eagles won the Super Bowl. Learn more here.