Meritline offers the Incipio Feather Case for Apple iPhone 4 / 4S in Metallic Black, model no. IPH-516, for $23.99. Coupon code "MLC608SN" trims it to $12.95. With free shipping, it's the lowest total price we could find by $5. This case touts a 1mm thickness, matte finish, and access to all ports and buttons. It also includes a cleaning cloth and two screen protectors. Deal ends June 9.