Pistons would be damn lucky to get Raef and the 7th pick for Ben. They're not going to have cap room no matter what they do so Raef's contract is a non-factor. Meanwhile the 7th gives them the ability to draft a center to take over Ben's spot. He's most likely leaving anyway because he hates the coach. Why you guys jumping all over Celtics fans for proposing this? it's much, much better than what you're getting: most likely nothing.
Imagine if he took the MLE from Dallas to play there. Holy Jesus.