The EP (extended play), which are 7 inch albums, were a staple of the early Rock and Roll era. In 1957, Cadence Records released two EP’s by the Everly Brothers. The first features their hits “Wake Up Little Susie” and “Bye Bye Love.” Vol.2 features “This Little Girl of Mine” and “Be-Bop-A-Lula.” Each EP, as shown here,can get you $100.00 today.