A4C offers the OtterBox iPhone 5 / 5S Prefix Series Case in Lime Green, model no. 77-22531, for $8.95 with free shipping. That's tied with last week's mention and the lowest total price we could find by $3, excluding the mention below. It features a flexible silicone exterior, rigid polycarbonate skeleton, and screen protector kit.

A close price: MasterDealsUSA via eBay offers it in Purple for $9.99 with free shipping.