All he has is a title with Billy's name on it. The bike is signed but how to you authinticate the signature. In my estimation the Billy Joel stuff only adds a small 5% or 10% curb appeal value. So the bike should be valued around $6500 to $7500 at the most. The milage is low and it has some nice accessories.
Now if he rode it in a music video that would be a horse of a different color.
