The Daily Dot - A 'fancy' serial number can make a $1 bill worth thousands
- At CoolSerialNumbers.com, Nashville musician and currency collector Dave Undis brings together like-minded digit-heads who have little interest in the history of money or even the denomination of a given note. Instead they are after certain patterns and series that fall under the flexible heading of â€śfancyâ€ť serial numbers.Low serial numbers, from 00000001 to 00000100, are sought after, as well as palindromes (23599532), solids (with a digit that repeats eight times), seven-of-a-kinds (66666665), ladders (45678901) and important dates (12071941). The criteria get even more obscure from there: Undis is seeking a pi note, with the number 31415927. But the more apparently jumbled the digits, the less likely it is that anyone with the bill in their wallet will ever notice.