When I was just a wee lad, starting to cruise the DC universe, this house ad popped up in one of the lesser titles, and I just went all popcorn. I had to have it! Well, none of my wee friends read comics and there were no back issue catalogues or stores. Even the drugstore didn't carry the JLA title until #9 , the first JLA I bought off the spinners (the cool origin issue which I read a gajillion times). I only finally got to read this issue once I bought the hardcover JLA Archives many years later.
This ad was for JLA #1, yet the actual cover had no number on it. A 1st issue DC comic, with no #1 emblazoned on it? JUST IMAGINE!