Royersford (PA) Man Has $10 Bill Worth $500,000?

Welcome to the wild world of currency collecting, where a “fancy serial number,” a printing mistake, or even just a star can mean a lot of moolah, especially on a rare or historic kind of bank note.

Find a bill with a serial number that’s low (starting with 00000001) a “radar” (same backward and forward), a “solid” (every digit the same), a “ladder” (digits count up or down), a “double quad” (like 77773333), or has one of a half-dozen other patterns, and you might have a prize that blows the face value away.