For the 2018 year end data, Diamond provided the top 2,000 comics and the top 5,000 trade lists with index values for the items. Using those index values I computed the estimated units for each item which could be different from the sum of the monthly reported sales due to reorders, returns or other factors. Marvel had the most items in the top 1,000 and the top 2,000 followed by DC in both cases. Over 77% of the items were had a $3.99 cover price with $4.99 the next most common price point.
What Is the Greatest Anime Rivalry - and Why ISN'T It Goku & Vegeta?