As one of its daily deals, A4C offers the OEM Otterbox Commuter Case for iPhone 5/5s/SE in Grey/Navy, model no. 77-32657, for $9.95 with free shipping. That's tied with our mention from two weeks ago and the lowest total price we could find by $5. Deal ends today.
There's a less expensive way, and then there's the way that works for you. The two may not be the same.