Olivia Newton-John had her first # 1 album in 1974 with “If You Love Me, Let Me Know”, which contained her third U.S number one single, “I Honestly Love You.” However, a copy is not worth much more than $10.00. What collectors “honestly” want is a copy of the album “Xanadu” from 1980 with Olivia Newton-John’s picture on the vinyl. It’s worth up to $6,000.00.