All4Cellular offers the iFrogz Luxe Hard Case for iPhone 4 and 4S in Blue for $2.95. Coupon code "A4C6A6" drops it to $2.80. With $2 for shipping, that's the lowest total price we could find in any color by $13, although we saw it in another color for $2 less last week (since expired). This polycarbonate case features control access cut outs and an interior lining. It's compatible with all iPhone 4 and 4S models. Deal ends November 23.