Home comic book Challengers Of The Unknown #016 View cart “Action Comics #284” has been added to your cart. 🔍 Challengers Of The Unknown #016 Grade 2.5 $20.00 CAD In stock Challengers Of The Unknown #016 quantity Add to cart SKU: ITM726847 Categories: comic book, raw Tags: silver age (1956-69), superhero Additional information Grade 2.5 Related products Action Comics #268 $20.00 CAD Add to cart Fantastic Four #056 $45.00 CAD Add to cart Fantastic Four #047 $75.00 CAD Add to cart Fantastic Four #050 $175.00 CAD Add to cart