It's been in an acid-free comic book box stored in a mylar comic sleeve for over 30 years, then I had it graded with GCG approximately 3 years ago. I had this issue along with #298 and #299 (which I cannot locate, I think my little brothers took it long time ago LoL). Only so you can have it in your hands quickly. The item "Amazing Spider-Man 300 CGC 9.0 Marvel Comics 1st Venom ORIGINAL OWNER" is in sale since Thursday, February 11, 2021.
This item is in the category "Collectibles\Comics\Copper Age (1984-1991)\Superhero\Spider-Man". The seller is "jimenez00" and is located in San Diego, California. This item can be shipped to United States.