I think Mathurin+Protected pick is where it gets interesting. The asking price from the Lakers was reported to be Reaves+2 picks, but this was before Reaves blew up. I think IND could create a similar level package with Mathurin and for all the Jazz stubborness I think they might accept something less than the proposed Laker package.
IDK....if you asked me about player on their own, I'd say that they could be moved because I don't think their team is super high on them. They could be traded for each other and figure out the difference with picks, whatever that is. I don't suppose Mathurin is considered a highly valued player on this forum, but if he was a Jazz player I think we'd be reacting to him like we are with Key right now.