He's played the same number of games as Ja this year. Over 40% from 3. Still a + defender. No money after this season.
I wouldnt give up anything substantial for him but if you dont trust Pippen in the playoffs, then maybe. If you want to get out of future money for Smart, this might be way to go without without attaching an asset for someone to take Smart's deal off your hands...
Use the Smart savings to potentially resign Santi this offseason.