Groupon offers the iLuv Street Beat Portable Speaker Case in four colors (Black pictured) for $8 plus $2 for shipping. That's the lowest total price we could find by $6. Sales tax is added where applicable. It features built-in easy-access power and volume controls, a zippered pouch, hanging clip and Velcro strap, and compatibility with any audio device with a 3.5mm jack. It requires three AAA batteries, which are not included. Deal ends January 17 at 1 am ET.