Look up in the sky! It's a bird! It's a plane! No, it's the price Action Comics No. 1 just fetched at auction. Superman's iconic debut issue grabbed a whopping $2.16 million in an online auction that started at just $1, the BBC reports. The edition, which shows Superman lifting a car on the cover, is now the most expensive comic ever sold. Neither the seller nor buyer have been revealed, but speculation is that Superman fan Nicolas Cage sold it. The actor, whose son is named Kal-El after Superman's birth name, bought a copy of the comic in 1997 for $150,000. The debut issue cost just 10 cents when it sold in 1938. Some 100 copies of the issue are believed to still be in existence, but only a handful are in good condition.