Here are some things I would look for when searching bills, as they may be worth keeping for possible selling later. I don't search bills myself, but I thought I'd put it out there.
-Old bills (Whatever you determine "old" is up to you, but I generally look for 1995 and earlier since those bills are harder to find) -High serial numbers (96000000 and higher were only used for uncut sheets, so that means someone bought a sheet of bills and cut them up to spend at some point.) -Low serial numbers (Not sure which ones command a premium, but I think once you're in the triple digits, they start becoming notable) -Star notes (we all know this one, they may end up being from a low print run) -Anything you else you consider interesting
What else is there to look for when searching bills?
Binary (only 2 numbers compose the serial number), radar, repeater (first 4 digits repeat a second time), ladders (0-7, 1-8. Or 2-9, also the reverse), also one I would love is 31425926 (or ending in 7 if you round).
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