All4Cellular offers the refurbished LifeProof Waterproof Case for Apple iPhone 4 / 4S in four colors (Black pictured) for $24.99. Coupon code "A4C20" cuts it to $19.99. With $2 for shipping, that's the lowest total price we could find for a refurb by $7, although we saw it for $2 less two weeks ago. It features 6.6-foot drop shock protection; it's also waterproof to depths of 6.6 feet. Deal ends January 20.

A 90-day All4Cellular warranty applies.