It makes more sense to hold onto him through the playoffs. He's not a UFA, so we won't lose him for nothing. It's a lot easier to find a backup then, than it is to find one right now. Plus if he gets playing time in the playoffs, it only improves his value.
If he gets offer sheeted, it's likely for more than the 2nd round compensation level. If it's 2nd round, we probably match since having Bernier and Reimer combine for less than 6 million is hardly an issue.
And really, he'll have value. At least equal to, if not more than Bernier. Bernier had no playoff experience, had never played more than 25 games in a season (and only played higher than 16 games once), and hadn't played as a starter. Reimer has done all of those things.
Reimer will have value, guaranteed. He's young, cost controlled and a better option for teams wanting a long term goalie option than going after an injury prone Halak/Backstrom/Hiller, or the likely aging and expensive Miller.
He'll likely get between what Schneider and Bernier/Bobrovsky received. Nonis won't give him away. And if he can't get value, he'll be resigned for a fair amount giving us a young backup who is capable of stepping into the starters role if Bernier falters or gets injured. It's really a no-lose scenario.