CTCStore offers Amazon Prime members the Acase Superleggera Case for Apple iPhone 4 / 4S in Black for $12.95. Coupon code "K23U9F89" cuts it to $5.95. With free shipping, that's tied with last week's mention of a red case and the lowest total price we could find by $7. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.05.) This polycarbonate and silicone case protects against dust and scratches. Coupon expires March 30.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.