I have a 100 start note with a run less than 128,000..im just now learning about them.. is this valuable?
If it is in crisp condition then MAYBE. Problem with 100s is that the face value is already so high people are less willing to pay much more. for example, you can easily sell a fancy $1 for $5-10, 5x to 10x face value, but it’s near impossible to sell a $100 for $500-$1000. If you can afford to keep a $100 bill, then sure, but otherwise it’s probably better to put it in the bank
In good condition, other then the tear at the bottom, even in mint condition your premium would be a minimum, unless someone was specifically looking for it.