In the amazing career of Elvis Presley, the king had numerous two-sided hits such as “Hound Dog” and “Don’t Be Cruel,” released on RCA in 1956. In 1957, RCA issued the double-sided hit, “Playing For Keeps” with “Too Much” on the flip side. Elvis introduced the hits on the Ed Sullivan Show in January of 1957. A copy of the 45 with picture sleeve can get you $150.00 today.