PHILADELPHIA — A rare and pristine copy of the first issue of Action Comics, famed for the first appearance of Superman, has set a record Wednesday for the most money paid for a single comic book: $2.16 million.

The issue, graded at 9.0, was auctioned online starting Nov. 11. The starting bid was just $1 but there was a reserve price of $900,000. Neither the name of the buyer nor seller was disclosed.

It's the first time a comic book has broken the $2 million barrier. When the issue was published in 1938 it cost just 10 cents.