NEW YORK (AP).- The record price for a comic book, already broken twice this year, has been shattered again. A copy of the 1938 edition of Action Comics No. 1 sold Monday for $1.5 million on the auction Web site ComicConnect.com. The issue, which features Superman’s debut and originally sold for 10 cents, is widely considered the Holy Grail of comic books. The same issue sold in February for $1 million, though that copy wasn’t in as good condition as the issue that sold Monday. That number was bested just days later when a 1939 comic book featuring Batman’s debut sold for $75,000 more at an auction in Dallas. There are about 100 copies of Action Comics No. 1 believed to be in existence, and only a handful in good condition. The issue that sold Monday was rated slightly higher than