He's cheap and under team control for three more seasons. I would not actively try to trade him.
Now if someone called, I would listen.
Don't forget, this franchise greatly overestimates their own roster. They tried to trade a 1st and Anthony Brown for Jamal Adams and the Jets laughed. Now, you could argue that Seattle greatly overpaid for Adams, but the going rate was two 1sts and a 3rd. Pretending Anthony Brown, who was picked up and cut by 3 NFL teams last year and is now out of the league, is equivalent to a 1st and 3rd is high-level delusion.