‘Adventure Comics’ #26
“Adventure Comics” #26 is by no means as valuable as many of the comics on this list. In 2017, a copy sold for a mere $7,767. But what “Adventure Comics” #26 lacks in value, it more than makes up for in rarity. This book, like many of the era, is almost entirely non-existent now. There are believed to be around five copies left in the world, making it potentially the since rarest DC Comics issue of all time, even if it’s not worth hundreds of thousands of dollars.