Groupon 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 three weeks ago as the best price we've seen. (It's 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.