Groupon offers the Griffin AutoPilot for Apple iPhone and iPod, model no. GC17048, for $4.99 plus $2.99 for shipping. That's the lowest total price we could find by $12. This device streams audio from your iPhone or iPod through car stereo. It features a power adapter and remote control that simultaneously charges your device and three-color charging light. Deal ends June 12 at 12:50 am ET.