Rock veterans the Eagles have teamed up with U.S. stores Wal-Mart and Sam's Club to raise money for charity by selling a limited number of autographed guitars. Band members Glenn Frey, Don Henley, Joe Walsh and Timothy B. Schmidt have signed the Takamine guitars, which will retail online at SamsClub.com for $2,500 (GBP1,250) each. All money raised will benefit non-profit organisation The Walden Woods Project, which preserves the land, literature and legacy of author/philosopher Henry David Thoreau. The Eagles' recent U.S. number one album Long Road Out Of Eden was only available to buy in Wal-Mart and Sam's Club shops.