As a possible price mistake, Verizon Wireless offers the LifeProof Nuud Waterproof Case for iPhone 6 Plus in Black for $9.98. Better yet, add two to your cart and the price for both drops to $14.97. With free shipping, that's $7.49 per case and the lowest total price we could find for two by $30. It's purported to be fully submersible to 6.6 feet for up to one hour. This shock-proof case is also IP-68 rated for dirt and snow resistance.

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It's unclear whether this will arrive in time for Christmas.