Sellers co-conceived a 1983 exhibition of Peale's work at the Metropolitan Museum of Art. He became editor of the American Colonial Painting magazine in 1959 and became an elected member of the American Philosophical Society in 1979. He was a member of the American Association of University Professors (Dickinson College chapter president, 1961–62) and the College Art Association. His papers are held at the American Philosophical Society and the Smithsonian Institution.
