I'd give them Kanter and our unprotected 1st this year for Parker.
Despite what people on forums say, Kanter simply isn't that good an asset. If he was, we wouldn't be so desperate to trade him. There is nothing we know that other GMs don't know with their armies of professional scouts. So we're basically trading Parker for our unprotected. I don't think the Bucks would do it, but I don't think it's out of the question either. Parker is questionable having had a major injury so soon into his NBA career, and both teams would be taking a risk.
It would be worth it if our pick is in the late lottery. Otherwise, I'd rather take a chance on a different player.