All4Cellular offers the OEM OtterBox Defender Case with Holster for iPhone 4S in seven colors for $49.99. Coupon code "A4COB35" cuts it to $14.95. With free shipping, that's tied with our mention from two weeks ago of a refurbished unit (this one is new) and the lowest total price we could find by $8. It features a clear protective membrane for the touchscreen plus openings for the camera lens, dock connector port, and home button. Coupon ends September 30.

Note that although these are new, they are bulk shipped, and may have some scratches.