Groupon offers the Aduro U-Band Sport Armband for iPhone in five colors, model no. AI5-RF01-ARM, for $7.99 plus $2.99 for shipping. That's a buck under our February mention and the lowest total price we could find by $8. It's adjustable and reflective and features a hidden key pocket. This armband fits iPhone 4, 4S, and 5, as well as the iPod touch. Deal ends July 16 at 1 am ET.