Just for our readers, these OtterBox Commuter Series Cases For the iPhone 4 & 4S drop from the retail price of $29.99 to $18.99 and then to $13.99 using our exclusive code BRADSDEALS at Tanga. Even better, the shipping is free. This is the lowest price we could find for these slim, form-fitting cases by $10. They offer dual-layer protection and guard against bumps, drops, dust and shock. 3 colors are offered and sales tax is not charged in most states.