A few months ago, a copy of Action Comics #1 had been auctioned off in eBay. Although the seller did not put a reserved price, at the end of the auction the comics reached a staggering amount of 45,000 U.S. dollars, despite the fact that the copy is not a very nice one and had been graded only 4 by CNC. The reason why this comic book is so expensive is because it is the first true Batman comic book, wherein the caped crusader first appeared.
Today I found an internet seller that offers a medium grade copy for a million U.S. dollars! Whew! Anyway this reminds me of a friend of mine who, in late 1980s found a nice copy of the Detective Comics #27.
Back then, we did not know that this comicbook contained the first comics appearance of Batman. Since there was no eBay then, or even the internet, he consigned it to a local antique shop. The tag price was P1,500 pesos, which seemed very expensive for us Filipinos.
A few months later, a knowledgable American tourist spotted it and bought it immediately. My friend thought he made a good deal out of it since he only bought that comics from a garage sale for 20 pesos! That comic book may have been left by G.Is in the country during the American occupation. The price of that comics today would be 200,000-500-000 U.S. dollars in good condition.