This was really tough to go back and try to figure out. Although I know I bought many comics before this (I remember seeing X-men 94 on the stands), this is the earliest book I clearly remember buying. It was at the student union of the university at Stony Brook, New York. My mom was finishing her dissertation and she would take me there on rare occasions and let me get a coke, a candy bar and a comic book. I was 5 years old.
Being too young to understand the concept of “reprints”, all I knew was I loved Spider-man and the stories were incredibly compelling. So, I set about collecting this title after buying this issue and loved every chapter of the unfolding narrative. From the Green Goblin to the six-armed Spider-man to the Savage Land all the way to the death of Gwen Stacy, these remain some of my favorite stories in all of comics. Probably also explains my lifelong appreciation of Gil Kane.
It wasn’t for a few years that I became aware that these had been originally printed in Amazing Spider-man 7 years before, that they were essentially worthless from a collecting point of view. When I did find out, it didn’t really matter because I still loved the writing and artwork in these issues.
(Not my copy, image taken from interweb)