Take a look at those 1's and 5's in your wallet or purse, because they could be worth thousands of dollars to collectors online.

Ordinary low denomination bills are being sold for thousands of dollars online in a new trend that is centered on the eight-digit serial number which appears on each bill.

The bills are being bought and sold on the website CoolSerialNumbers.com with low serial numbers from 00000001 to 00000100 being the most wanted.

A dollar bill with the serial number 00000002 is going for $2,500 on the site.

Now pardon me as I comb through every single I can find, hoping that they haven't been in too many undesirable places.