Note: Rare_84 Info

While many star notes are actually quite common, they become highly collectible and valuable if they come from a low print run (under 3.2 million, or sometimes under 640,000 for extreme rarity), feature fancy serial numbers (like radars, ladders, or solids), or are part of older series currency.

A highly sought-after variant is the filled star error, where too much ink makes the star look solid, increasing its value to collectors due to the printing defect. Note: rare_84

They are replacement notes, printed separately from the regular printing process, to replace a damaged note or sheet of notes, typically identified by a star ( ) in the serial number. While many star notes are actually quite common,

Explain the difference between a and a repeater serial number. or sometimes under 640