Coinman123, I did notice that the "pincher 8" variety is not listed in the Red Book, but I figured it (the Red Book) would at least give you a bottom-floor value -- which is higher than what you paid for your 1818 half-dollar.
As Coinguy*matthew mentioned, well-focused closeup photos of your coins front and back would be helpful.
Since it's not in the Red Book, please educate us about the "pincher 8" variety. I'd like to learn about it, and perhaps others here would too.