I am with you on this. The CSA halves have been underpriced fiorever. It's mystique is not that Davis owned it, he did n't and was unlikely aware of its existence. The mystique is, much like the 1913 Liberty Head Nickle, it is a coin that was never supposed to have been made! The nickels go for 7 figures.
There's an additional funny with the $10 note. Before Burr, Hamilton was in ten "shot-less" duels. I'm not exactly sure what that is. I think it's when the duellists or the seconds (who don't want to lug their "kilt-ed" friend off the field) work out some kind of agreement before the duellists take the field? Anyway, he wasn't so lucky with #11, which was fought on lucky 7-11 1804.