All4Cellular offers the Incipio Destroyer Rugged Case & Holster for iPhone 4 for $14.95. Coupon code "A4C6A5" drops it to $14.20. With $2 for shipping, that's the lowest total price we could find by $5, although we saw it for $10 less in April. It features a hardshell frame, silicone inner core, and electrostatic membrane. Deal ends November 5.