Sportstrend via Amazon offers Prime members the Sportstrend Armband for iPhone 5/5s/4/4s in Black for $9.99. Coupon code "G97WPVAG" cuts the price to 99 cents. With free shipping, that's $5 below the lowest total price we could find for a similar armband elsewhere. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $6.07.) It features a built-in key holder and reflective strip.