Apparently, this guy bought the comic years ago, in 1974, when he was a college student. People thought he was crazy. Check out the link for the full story, as well as, how you can bind on the comic book!
Batman comic bought for $1,200 could sell for $400,000+ in August auction
CGC Certified VF-7.5 Detective #27 was bought by college student in Hawaii in 1974
DALLAS, TX – A CGC Certified VF-7.5 copy of Detective Comics #27, known as the “Aloha” copy, is expected to bring $400,000+ when it makes its hobby debut as part of Heritage Auctions’ Aug. 5-6 Signature® Comics and Comics Art Auction. It is expected to bring $400,000+.
“We think this could become just the second comic to top $400,000 at auction,” said Ed Jaster, Vice President of Heritage Auctions.
In February of this year Heritage’s offering of Batman's first appearance broke the existing world's record for a price realized at public auction for an individual comic book when it brought $1,075,000. In fact, it was because of that comic, and the international attention it garnered, that the consignor of this copy brought it forward.