He's worth a shot. He's still a 7'3'' 260 athletic dude that, with the right coaching and motivation can be a defensive beast.
I believe that he will never develop as an offensive, back to basket center, but he can be a very good rebounder, a great shot blocker and an very good interior defender. He just needs somebody who can motivate him that this is his role, he can be great at it. Only problem is i've read articles saying he's lazy, but hey, you'd never know. With the proper pep talk it might put his head into the right direction.
Why not, as long as it's not more than 3 mil.