NJD might do Bernier and a 2nd to Buffalo for nothing, but Blackwood i feel they give another chance to since he is only 25.
not sure why the Seabrook deal is done. there are plenty of active players you could charge to pick up who could get you to the cap floor.

There's a rift between Blackwood and the NJ Devils. Both sides open to parting ways via Trade. (c) Friedman

if that's the case then this could work.
but after his season i think your giving up too much.
I would offer one of the 23 2dns (latter of the 3) for Blackwood and a 23 3rd.
your doing them a favor by opening up a spot for better goalie so I doubt they ask much.

Blackwood might be worse than Tokarski