The Mighty Thor #300 (October 1980)

This is a classic piece of Marvel history, the special 300th issue of The Mighty Thor from 1980. It's a double-sized anniversary issue featuring a pretty epic cover with Thor and his hammer, Mjolnir. It's been read and enjoyed, showing some light wear along the edges and spine, but it's still a great copy for any fan of the God of Thunder. It even has that nostalgic Toys "R" Us shopping spree contest banner across the top.