Von has bought himself at least until Delonte comes back with his play in the last couple games. There is no one on the market who is good enough to make it worthwhile to start over, and have them learn the system. Wafer knows the system now, and is therefore more valuable at this point.
Once West comes back, and teams start looking at buying out legitimate players however (rather than cutting the bottom of their roster), then they can look at either cutting Wafer, or trading him for air (like they did with POB), in order to save some of the cash.
But for now, he is not going anywhere, because frankly, they need him.