what are the most popular us coins to collect?
['50 State Quarters. The United States Mint began minting these modern quarters in 1999. ... ', 'Morgan Dollar or Peace Dollar. Morgan Dollars were common Silver Dollars circulated in the late 1800s and early 1900s. ... ', 'Liberty Seated Dollars. ... ', 'Saint-Gaudens Double Eagles. ... ', 'Gold and Silver Maple Leafs.']