I think Earl Thomas was (and maybe still is), one of the best Safeties in NFL history... and if the Packers are going to a single high Safety defense (like some suggest)... then Thomas would be the perfect fit!
But Seahawks already know this, and I heard that they want a minimum of a 1st and 3rd round picks. Also Thomas has talked about retiring before when he was injured, and was hoping to get to play with the Cowboys atsome point of his career.
The Cardinals have seemed to do everything in their power to keep their best of the best..., so I doubt they're going to let one go unless they simple have over spent and can't afford someone.