Your $1 bill could be worth thousands. If you’ve ever read the eight-digit serial number on a dollar bill, it was probably out of sheer boredom. But those digits are more than a number to a thriving online community, for whom they can take on a near-mystical significance. Right now, on their website, you can buy a $1 bill with the serial number 00000002 for a whopping $2,500 or consider a $5 bill with the number 33333333 for $13,000. 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).