I think I would still be on my butt with my jaw dropped after seeing that one come out of the ground !
Not many of us have or will find one of those. Glad to see no recovery slices or dings in it.
The 1831 had a mintage of 5,873,660, which is high compared to other years in the series, but low compared to modern mint numbers.
I did a quick look at my PCGS Coin Grade APP and my guestimate is that yours would be in the high XF grades.
See the link below for current prices for the 1831 Capped Bust Half in different grades.
Jim
https://www.coinworld.com/coinvalues/half-dollar/1831-capped-bust-half-dollar.html