Some team is going to give up a Toskala-like package for Bernier, thinking that he is a lock to be a great starting goalie, and for their sake, I hope Bernier turns out better than Toskala.
For the Leafs, Bernier would be far too expensive to make it worth getting him, when they already have Reimer.
Trading frattin along with another mid-level prospect for Bernier is not considered expensive, considering Frattin can be replaced, easily.