Yeah, if I had a silver coin worth anything more than melt-value, to hell with Mexico - I'd sell it and buy ammo. Or more coins. Hehe.
But yeah... it's nice to wish.
Carson City mintmark? Good luck!
I already have a 1889cc but it is a very low grade*damaged* but I guess laying under ground for near a century will do that I might get $300-400 for it if I really pushed it.
beleive it or not I sold this one for $250 1885 V nickel