Elvis Presley's "Stay Away, Joe" promotional album (1967)
This one-sided LP was one of a kind, pressed to be played Nov. 5, 1967, at a Cottonwood, Ariz., radio station. Because of its rarity, the 12-inch LP is valued at $25,000 or more. It contains a 30-minute radio program that includes nine Elvis gospel songs and promotes the Presley movie "Stay Away, Joe" and two gospel albums. A note on the inner sleeve asks that the album be returned to Col. Parker's office after airing -- and the record was discovered in his estate in 1999 [source: Jerry Osborne].