Wireless A to Z via Amazon offers the OtterBox Defender Series Case for Apple iPhone 5 in Black, model no. 77-21908, for $29.50 with free shipping. That's $4 under our mention from two weeks ago (in a different color) and the lowest total price we could find now by $3, outside of the price below. It features access to all ports and buttons.

A close price: MacMall has it for $29.99 with free shipping.