What do they even have to offer?
They have a ton of expiring contracts and a number of young players (even outside of Hield, Fox, Bagley, and Bogdanovic). Kings also have cap room so they can save a bunch of salary for the Mavs. I mean something like Randolph and WCS works in the trade machine. Saves the Mavs 8 million, gets them below the cap, and they get a decent youngish player in WCS. Kings also have expiring contracts of Koufos, Shumpert, and McLemore as well as players like Giles, Labissierre, Jackson, Mason, Ferrell, and Williams. So the trade can be expanded to include more long term salary.