Popularity vs Scarcity in the Comic Market

Would you rather have a Batman Adventures 12 (1st app of Harley Quinn) or a Detective Comics 140 (1st app of Riddler) (Values Aside)! It is an interesting question. Both have some popularity, but the Batman Adventures 12 has way more popularity. Popularity is how many dealers and collectors are interested in a book, and have money to buy it. Popularity is not just liking a book. In that case, Action Comics 1 would be considered a popular comic book! Most con-goers cannot find a Detective Comics 140 (There are less than 150 copies graded in total by CGC), let...

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