The ONLY coins that would be worth a lot of money, would be gold ones.
The ONLY people who would pay exorbitant prices, on E-bay, would be someone like you, who isn't a numismatist. :-)
Not so. Get me a nice, clean (not mint) Morgenthau $100 from FDR's 1st term, and I'll gladly pay you $115 for it. Or a $100 Snyder from the Truman admin in 1950. Might even bid a bit higher for that one. David Kennedy $100s are very scarce, too (short term as SecTreas).