Is it for a keeper league? If so, I'd say yes. Heck, with 20 games left in the regular season I'd do it as well. Raanta and Arizona are playing well and who knows what the Rags will look like after the fire sale.
If I'm going to pick up Raanta, I'd look at dropping another player. At the same time, I'd put Lundqvist on your trade block and send some offers out. There might still be that owner that thinks he is still an elite goalie.