'If you look at a dollar bill, the number can just jump out at you,' Dave Undis, founder of, a website that buys, sells and trades fancy serial numbers, told The Boston Globe.
'Fancy' serial numbers can go for tens of thousands of dollars-depending on how rare the combination is. But currency collectors do-and some are willing to pay big bucks for an especially unusual number. Most people don't even notice the serial number printed on their dollars. Your money could be worth more than you think, thanks to eight tiny numbers.
