You've probably spent hundreds of dollars without giving them a second thought. Maybe you've folded that crisp blue Benjamin for your wallet or handed it over for groceries without even glancing at ...

JOPLIN, Mo. (KSNF) — That $1, $5, or $10 bill in your wallet might be worth way more than its face value. Knowing what your paper money might be worth is all in the serial number. Serial numbers are ...