Paper Money Collecting?

quote:

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"Solid Serail Number 77777777 or 11111111
Ladder Serial Number 12345678 or 87654321
Repeater Serial Number 12341234 or 21342134
Radar Serial Numbers 12344321 or 98766789
Low serial Numbers 00000021 or 00000134
High Serial Number 99999912

The number 8 is considered lucky to the Chinese. If you found a note with solid 8's some Chinese people will pay millions for them. Currency with solid 8's in Asia are destroyed when they are printed because of this.

Even if a serial number is 00009999 then it would carry a premium. But the more solid the number, the better." --Tykimeister

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Tykimeister sums it up pretty well and I think the only one not mentioned is one that you already did and that's the consecutive serial numbers.

I wouldn't save the "small face" bills unless there's something special about them: star note, collectible serial number, or maybe if they're in CU condition. Otherwise, they probably won't go up in value, not even for the next couple of decades. Modern notes just don't have much value unless they're in CU condition.
Of course, errors always command a very nice premium. The star notes are worth hanging on to, especially if they're in a very high grade.
Here's my best advice about collecting notes. Trade any modern notes you have for quality collectible notes from the early 1900's or even earlier. If the dealer gives you a premium, because you're paying with star notes, then all the better!

I would not save circulated star notes unless they were in great shape and came from a super short printing.
I only collect CU notes for various sets.