Groupon still offers the Scosche railKASE Aluminum Bumper for iPhone 5 / 5s in Black for $6.99 plus $3.99 for shipping. That's tied with our mention from a week ago and the best price we've seen. (It's also a current low by $12.) Crafted from aircraft-grade aluminum, this bumper features an internal rubbery TPU band that cushions the phone and absorbs shocks.