All4Cellular offers the refurbished OtterBox Defender Case with Holster for AT&T iPhone 4 in four colors for $9.95. Coupon code "A4C2012" cuts it to $8.76. With free shipping, that's $7 below last week's mention of a new unit and $13 under the lowest total price we could find for a new one today. It features a clear protective membrane for the touchscreen plus openings for the camera lens, dock connector port, and home button. Deal ends December 22.

Note that the product page states it's compatible only with the black AT&T iPhone 4. No warranty information is available.