Got a spare million or two lying around?
Then maybe you'll want to drop by Christie's auction house and pick up an original copy of Copernicus' De Revolutionibus Orbium Coelestium.
Need I say it? Holy Haleakala!
This is the book that forever changed the world, in which Copernicus proposed a new model of the solar system where the Sun was at the center, not the Earth. I hear Galileo had something to say about that based on this book, too.
Man, how awesome would it be to have something like that? After all, I <3 heliocentrism.