Very often, the potential record buying public have to be told that a certain product is available. For example, many years ago ( the 1970s), someone had the bright idea to release a "Best of Slim Whitman" album and advertise it on tv. The album went to number one! Now, Slim Whitman had been a star in the 1950s, AND, compilations of his hits had always been available (like Very Lynn), but the public had to be told that they were available. Lots of older record buyers don't know what's available AND keep out of record shops in case their ears are perminantly damaged, so they are unaware of what is available. A bet lots of middle-aged people are buying this recording for their parents.