Scarce DC Batman Comics Summer Issue Number 2: 2nd Appearance of The Joker and 2nd Appearance of Catwoman (1st Time she was called Catwoman) Professionally restored to Grade VF-7.5 with Certificate. Overstreet Guide is Grade 6.0 = $6000, Grade 8.0 $15000 so 7.5 is around ?10000 = ?6350. As Golden Age Key become rarer restoration will increase and become more accepted. (Action Comics No 1, which features the first appearance of Superman and cost 10 cents in 1938 has sold for a little over $3.2m (?1.9m), the highest price ever paid for a comic book.)