The rarest and most valuable Monopoly game in the world is the original hand-drawn oilcloth set created by Charles Darrow in 1933. Before Parker Brothers bought the rights, Darrow produced about 5,000 sets by hand; the circular oilcloth version is the only one of its kind known to survive and was sold at auction for over $146,000. Another legendary rarity is the 1935 "White Box" set, produced in very limited numbers during the first year of mass production. In the realm of modern collectibles, the Monopoly 90th Anniversary Gold Edition (2025) and the 1991 Franklin Mint Collector’s Edition with silver and gold-plated pieces are highly sought after. However, for sheer uniqueness, nothing beats the solid gold Monopoly set created by jeweler Sidney Mobell in 1988, valued at roughly $2 million. For a 2026 collector, finding an original 1930s "Black Box" edition in mint condition is considered a "holy grail" find, as most early sets were worn down by decades of family play before they were recognized as historical artifacts of the Great Depression.