Pre-100 FANTASTIC FOUR?
Lee/Kirby issues? That would be quite a haul.

One I remember, when I was 12 years old and traveled with my family to Ocala, FL, this mom-and-pop corner store had old 1968-1971 comic books on the magazine shelf, as if they were new comics, and they were selling them at cover price, 12 and 15 cents an issue! Man, what a day (this was 1975).

I got Ditko's BEWARE THE CREEPER 6, WONDER WOMAN 195, WORLD'S FINEST 183, and BRAVE AND THE BOLD 90 and 96. I thought I'd died and gone to heaven. Probably someone had given them to the shop owners, and they sold them at clearance prices to make them move.