Comics published prior to 1985 may not have had a large disparity in the number of Newsstand vs. Direct, but after that point Newsstands became exponentially rarer. By 1995, it is estimated that less than 10% of comics printed were Newsstand copies.
Since many collectors worked with their favorite comic shop to bag and board the best copies received, most graded and collector issues (especially in 9.8 grade) tend to be direct editions. Newsstand copies tend to be referred to as reader copies since most collectors opted for direct editions. This ultimately made Newsstand copies rarer. As you can see, this is a chance to have an ultra key book in the rarest of grades, can't find many like this in existence at a 9.6.
The item "Amazing Spider-man #300 CGC 9.6, 1st app of Venom, WP, ULTRA RARE NEWSSTAND" is in sale since Sunday, May 2, 2021. This item is in the category "Collectibles\Comics\Copper Age (1984-1991)\Superhero\Spider-Man". The seller is "indygreek" and is located in Libertyville, Illinois.
This item can be shipped to United States.