Magna Carta Auction coming

As I reported previously, the 13th century copy of the Magna Carta displayed until this year in the U.S. National Archives will be auctioned by Sotheby's on December 18th. As the sale approaches, Sotheby's rhetoric is ratcheting up: according to the Associate Press, vice chairman David Redden calls it "the most important document in the world. ... It is a document to learn from, and also a symbol, an icon, a holy grail -- all of those. It is one of those touchstones of culture." They expect it to sell for $20-30 million.