The $1 Bill Millions Ignore — But Collectors Are Paying Big Money For

Collectors look for extremely specific patterns — the kind that appear only once in millions of printed notes.

Here are some of the most sought-after types:

1. Seven Repeating Digits

Example: 09999999, 18888888, 19999999
Bills like these are incredibly rare because having seven of the same digit is almost statistically impossible during regular printing.

2. Seven-Of-A-Kind Serial Numbers

Example: 00010000, 00090000, 90999999
These bills contain seven identical digits with one variation — a pattern collectors love.

3. Super Radars

Example: 01111110, 10000001, 80000008
These serial numbers read like a mirror — the same numbers at both ends.