Compilation Box Set Reissue.
 
Their Greatest Hits is the first compilation album by the Eagles, released in 1976. The album contains a selection of songs from the Eagles' first four albums released in the period from the Eagles' formation in 1971 up to 1975. It was the best-selling album of the 20th century in the United States, and it stayed the best-selling album in the U.S. for some years until it was surpassed by Michael Jackson's Thriller after the artist's death in 2009.[1] In August 2018, it regained the title of the U.S.'s biggest-selling album, with a 38× Platinum certification by the Recording Industry Association of America.
In 2017, it was selected for preservation in the National Recording Registry by the Library of Congress as being "culturally, historically, or artistically significant