All4Cellular offers the factory-refurbished LifeProof Waterproof Case for Apple iPhone 4 / 4S in four colors (Black pictured) for $24.99 with free shipping. That's $22 under last month's mention of a new case and $15 below the lowest total price we could find for a new one today. It features 6.6-foot drop shock protection; it's also waterproof to depths of 6.6 feet. Deal ends today at 10 pm ET. A 90-day All4Cellular warranty applies.