All4Cellular offers the OtterBox Defender Case with Holster for iPhone 4S in White/Black for $20.95. Coupon code "POTW" cuts it to $18.85. With $2 for shipping, that's the lowest total price we could find by $9. (We saw a refurbished one for $2 less yesterday, since expired.) It features a clear protective membrane for the touchscreen plus openings for the camera lens, dock connector port, and home button. Coupon expires March 26.