The U. S. Postal Service is celebrating Maine’s Bicentennial with a new Maine Statehood stamp. Hopper painted Sea at Ogunquit in 1914. The USPS used another Hopper work on the 1970 stamp honoring the state’s 150th anniversary.
The Postal Service printed 20 million of these stamps, so there should be enough for all who want them, whether for use on daily mail or as a souvenir or part of a collection. You can purchase the stamps here.