Only about one in 11 million bills has this valuable "solid" serial number.

Most people treat a $2 bill like a curiosity. You get one as change, tuck it in a drawer, and forget about it for years. It feels special somehow, but you're never quite sure why. That instinct to ...

That $1, $5 or $10 bill in your wallet might be worth way more than its face value if it has one of these types of cool ...