APMEX offers a superb selection of 50 State Quarter sets.
Beginning in 1999, The United States Mint started releasing a series of commemorative coins to honor each of the 50 United States. The reverse of the coins were usually designed by residents and put to a vote. Five new State Quarters were minted per year according to when each state became part of the Union, the last of which released in 2008.
The purpose of the 50 State Quarter Program was to encourage a new generation of coin collectors. Today, the 50 State Quarter Program is the single most successful numismatic program in history! With roughly half of the American population collecting this series, don't be the one who missed out! Start collecting now and own a piece of history that your children and grandchildren will be curious about for years to come.