I loathe Howard's body of work, and as that body of work stands, he will not help the Celtics.
But ... people do change. If he wants to work, and if he wants to realize he is no longer a front-line NBA star, and if he wants to contribute to a team instead of his incessant me, me, me nonsense, I would agree that he is worth a look.
At a good price, and with a clearly defined out to get out of a bad deal if the same old Clown comes to Boston.