I have this Arrow season 3 episode 1 script signed by the cast.
Personally sent to me by writer and showrunner Marc Guggenheim to help raise money for The Brain Tumour Charity.
The cover has been signed by multiple members of the main cast and production team, including:
* Stephen Amell * Emily Bett Rickards * John Barrowman * Katie Cassidy * Willa Holland * David Ramsey * Colton Haynes * Paul Blackthorne * Marc Guggenheim * Additional signature(s) still to be identified.