Last month, a very rare comic made history: Action Comics No. 1, the first time Superman ever made an appearance in a comic, sold on eBay for a record-shattering $3.2 million.
But comic books aren't the only crazy expensive things people are selling on the auction site.
From sports memorabilia to cars, people are shelling out some big bucks to be the highest bidders and grab a piece of history.
Nintendo World Championships - $99,902
In January, a super-rare Nintendo World Championships cartridge, which was given to finalists and winners at the 1990 event, was sold for almost $100,000.
The game was placed on eBay for just $5,500.
Hot rod from the movie "Grease" - $180,100
Earlier this year, a California seller put up for auction a restored 1949 Mercury hot rod that was used in the 1978 film "Grease."
This is the car that Greased Lighting races at the end of the movie at Thunder Road.
It sold for more than $180,000.
Barry Bonds' 715th home run ball - $220,100
Barry Bonds' 715th home run ball sold on eBay for just over $220,000 in 2006.
That ball put Bonds in second place in the all-time home run list.
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