Elvis' Private Planes, Janis Joplin's Vest Hit the Auction Block

From unreleased Bob Dylan song lyrics to Willie Nelson's braids to John Lennon's "Paperback Writer" guitar, it's been an interesting few months for rock memorabilia on the auction block. That trend looks to continue in 2015 as a few more rare music-related items will go to a winning bidder: Elvis Presley's private planes......