Patsy Cline: 12 Greatest Hits (1967)
This is a reissue of a great early compilation of Cline's most popular songs. According to reviewer Rick Mitchell, it was the highest-selling album by any female country musician until the reign of Shania Twain in the 1990s.
The Patsy Cline Collection (1991)
This box set produced by MCA brings together 104 recordings from Patsy Cline's recording era, which lasted less than ten years. It's essential for fans and apparently includes rare photos in the liner notes.