I haven't so much as bought an album for the art, but I have gone out and bought art books because of the album art: M.C.Escher (Mott The Hoople's first album) and Roger Dean (a lot of Yes' albums).
Have U ever bought an LP because of the cover art?
I was talking to a friend who was telling me that he got into various artists because the LP cover was interesting, have you ever bought something for the same reason?