While looking around on eBay, I found this~
http://cgi.ebay.com/Sexy-Ayumi-Hamas...item255f58b6d5
(I searched "ayumi hamasaki" and set the options to "price - highest first" to see all the cool stuff, and I found this, and clicked on it because I was curious about the "w/ proof" part... There's a picture, but you can't see the picture itself getting signed. But it does look pretty legit... O_O")
It says that it was from Ayu in LA~ the 26th~
That is a huuuuge price for this...and it should be special to the person who got it signed, imo