No, and no. Sorry. Some of our number-hunters might say "I'd keep them if I found them", but nobody would pay above face value for either of them.
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What exactly is considered a unique serial number if these aren't?
All serial numbers are "unique". The human capacity for pattern recognition makes some of those unique numbers more desirable than others, even to the point of paying a premium for them. But alas, notes that "almost" fit a desirable pattern aren't worth any premium - just like a lottery ticket with "almost" the winning number is worthless.
What would be similar to your 55555141 that would be desirable?
- semi-solids - eg. 55555111
- 'low number' - eg. 00055555 (although to truly qualify as "low" you'd really need more zeroes than non-zeroes, such as 00000555)
What would be similar to your 20046017 that would be desirable?
- 'date note' - eg. 06172004, or even 17062004 or 20040617. The "60" in your number makes it impossible to fabricate a date out of it, however you try to write a date.
- 'repeater' - eg. 20042004
Even these ones I have mentioned above won't attract much if any premium for notes in your condition. Scruffy, stained notes are only likely to attract a big premium if they have one of the most desirable patterns: solids (55555555), radar (20044002) or a really low number (00000012).
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis