Free agents only come to a winning environment. The Kings won't be winning for years to come. If Vlade couldn't sell a franchise with DMC, he can't sell a franchise without him. Actually I'm not sure if Vlade can sell anything. He got fleeced twice in a trade now. How should anyone living an NBA life take this dude seriously. He also lost any credibility of being a GM, who treats his players with respect, if rumors are true, that DMC found out about the trade during an interview on All-Star-Day.
No matter if this is a business, that's not how you should approach things, especially if you are the GM of a small market franchise trying to change the perception of the franchise.
The worst thing Boogie has ever done, was throwing profanities at people face to face. To me backstabbing your most loyal player possibly even without calling him in person is worse.