A select few are worth good money. Like with anything, you must have the knowledge. Far too much to go into here. Billions and billions were printed, across at least nine series, from 1935 until 1963. Most are worth a small premium above face value.

Unless the note is an uncommon date or issue, star note, or is in exceptionally good condition it isn't worth a whole lot. Most of them really aren't even worth more than $2

yes One dollar