$3,000,000...

This is the starting bid for The World's Greatest Music Collection. From EBay:

From Thomas Edison to American Idol, this is the complete history of the music that shaped and defined five generations. 3 million records and 300,000 CDs containing more than 6 million song titles. It's the undisputed largest collection of recorded music in the world. About half of the recordings are new and never played, and every genre of 20th century music is represented. There are countless rare recordings worth hundreds, or even thousands of dollars each on the collectibles market. Organized and cataloged, the collection is meticulously maintained and housed in a climate-controlled warehouse. The estimated value of this amazing collection is more than $50 million.

Every recording in the collection was purchased by the collection's owner over the past fifty years and represents a lifetime of work and his desire to see the music preserved for future generations. Advancing age and health concerns are forcing the owner to sell.

The history of 20th century music belongs in a museum (existing or new), or a music library. The collection's owner is seeking a private collector or a philanthropist willing to buy and donate the collection. A donation would qualify as a tax-deductible event. The collection contains many thousands of duplicate copies, which could be sold individually on the collectibles market to recoup a substantial part of the purchase price.