Plan to shop at the State's Largest Indoor Garage Sale! Merchants' Attic will be held on Saturday, February 14, 2015 at the Rehoboth Beach Convention Hall, 229 Rehoboth Avenue, Rehoboth Beach, DE. The doors will open promptly at 9:30AM, rain or shine. The hours are 9:30AM to 1:30PM. There is no admission fee; however donations for the benefit of the Chamber Event Fund are welcome.