A4C offers the refurbished LifeProof Case for iPhone 4 / 4S in four colors (Purple/Black pictured) for $19.95 with free shipping. That's tied with last month's mention of a refurb and $37 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.

A 90-day A4C warranty applies.