Insanity's trade value can hit rock bottom fast. Like Brick said, it would give us a "stable" future trade chip. If Ron wakes up on the wrong side of the bed and becomes "RonRon", and decides he wants to rap rather than play ball, or join the opera or tour all the baseball stadiums in Japan, or whatever, we're screwed.
With Lamar Odom, the only thing that's gonna drop his value is if he gets seriously injured (or if he smokes his way into a coma upon hearing that he's been traded to Sacramento for Ron Artest), and while that' s a real possibility with a guy like Lamar, it's a lot easier to live with that possibility than with the uncertainty of whether Artest is Ron, or if he's "RonRon". Which can change with the breeze.
So if the Lakers called and said: "Give us Artest and we'll give you Lamar," I'd ask for a second rounder to go along with it, and if they called back and said no, I'd say: "Give me Lamar." And if they called back and said yes, I'd say: "What's wrong with Lamar? Hell, who cares?! Give him to me anyways. And thanks for the pick, Mitch."
Because an instable crazy person is always trumped by a sane injury-prone person.