Of issue 1-27, 13 was the toughest one for me to find. It was the last one I needed, before that was 26. 12 might actually be tougher, but I found that early in nice grade in a bulk buy from a collection. I should have stopped after completing that part of the run, but I had to go on to collect Top Notch Laugh 28-45 and that where all the fun went away....trying to finsh that part of the run took forever and was agonizing.
BH, in addition to Top-Notch, what titles do you collect?
All the MLJ's. Blue Ribbon was another of my favorites as well as Jackpot and Pep, shield Wizard and Hangman.