I'm not sure where you would find it, but out of curiosity... why would you want to purchase an abandoned missile site? I'd imagine it's expensive. And useless.
call me strange, mad or paranoid friend, (or all three) but the underground has always held a special allure to me. i recall exploring drainage tunnels as a child, and minor spelunking with dad. the history a place holds, what it was, why it was, and what its purpose was, the whole history aspect, it just gets me going. there is also something to be said, especially in this day in age, for finding a tactically secure homestead. i pride myself on preparations i make for just about any eventuality, and living underground in a hardened structure would be the pinnacle of those preparations.
and thanks for the link, hopefully ill find my new home.