Amazon, Target, Overstock and Barnes & Noble sell the "Wagner Complete Operas" boxed CD set, as of August 2015. The set was released in 2013 in celebration of the composer Richard Wagner's 200th birthday.
This limited-edition set of 43 CDs contains 13 operas, with performances dating back as far as 1976. Fourteen of the discs include Wagner's "Der Ring des Nibelungen," known as the Ring Cycle, a four-part composition considered the longest opera, lasting 18 hours, when performed with intermission. The four parts are each separate operas, including "Das Rheingold," "Die Walkure," "Siegfried" and "Götterdamerung."
"Wagner Complete Operas" includes performances by notable singers such as Placido Domingo, Cheryl Studer, Margaret Price and Rene Kollo. The collection also comes with a 140-page booklet, though the libretti are not included.