All4Cellular offers the Incipio Destroyer Rugged Case & Holster for iPhone 4 / 4S for $14.95. Coupon code "A4C6A6" drops it to $14.20. With $2 for shipping, that ties our mention from three weeks ago, and is $7 under the lowest total price we could find for a similar case elsewhere. It features a hardshell frame, silicone inner core, and electrostatic membrane. This case claims to fit all iPhone 4 and 4S models. Deal ends November 25.