The last decade of the 20th century produced coins that modern numismatic enthusiasts spend three-, four- and even five-figure sums to get their hands on today. The U.S. Mint produced collector coins ...

With a manufacturing cost of 13.78 cents per nickel, the price is more than double than that of a ... consistent since changing the value of a coin denomination each time the cost of manufacturing ...

Double-denomination coins are among the most coveted curiosities ... known as the 11c (11 cents) The Jefferson nickel on Lincoln cent, or 6c The big two combos are rarities that can be valuable.