All4Cellular offers the refurbished LifeProof Case for iPhone 4 / 4S in White/Grey (pictured), Black, Pink/Gray, or Purple/Black for $21.99. Coupon code "SAVE20" cuts it to $17.59. With free shipping, that's $2 under our refurb mention from last month and the lowest total price we could find for a new unit in any color by $9. It features 6.6-foot drop shock protection; it's also waterproof to depths of 6.6 feet. Coupon expires April 16.

A 90-day All4Cellular warranty applies.