By no means am I pining for Stephon to don green, nor am I really convinced he'll ever get bought out; however, if he gets bought out, rolling the dice on him is a luxury that a champion like the Celtics can afford. Signing him to a minimum deal has about as much risk as the Sox signing Bartolo Colon. If he produces, great; if not, cut him.
With a leader like KG, plus PP and RA around, a trial run of Marbury would not destroy this team.