Marvel's Avengers may rule the box office, but DC's Batman is king of e-commerce.
Comic book collectors are notorious for seeking out prized issues, and the Dark Knight is top of the list for treasure hunters on eBay. In the last six months, shoppers on the site shelled out $4.7 million on Batman comics, according to an analysis by market research firm Terapeak. (Tweet This)
And the contest wasn't even close. The second-place Avengers came up short by a margin of $1.7 million.
This was not the first time Terapeak has studied superhero sales. Last year, it issued a report on which superheroes move the most comics, toys, costumes and other merchandise on eBay—and Gotham's favorite son came out on top in that report, too.
"The first time we did this about a year and a half ago, I think we were surprised Batman towered above everyone else in terms of eBay sales," said Aron Hsiao, data scientist at Terapeak. "We thought it would cool off."
Hsiao and his team figured the caped crusader might be riding high on the buzz around the 2012 film "The Dark Knight Rises" when they first ran the numbers, but at 76 years old, Batman remains a spry moneymaker.
Terapeak decided to focus on comic book sales after eBay promoted its comics marketplace last month by asking Reddit users to weigh in on 20 superhero grudge matches. The firm wanted to see how those 40 superheroes stacked up in dollars and cents, so it gathered data on auctions over the last 180 days to find out what collectors were searching for and how they were spending.
Since eBay selected the characters thematically, some high earners may not be represented. But the list includes most of Marvel and DC's best-known heroes and villains.