Groupon offers the iLuv ModernBox Smartphone Speaker Dock in Black, model no. iSP125BLK, for $8.99 plus $2.99 for shipping. (Orders of $15 or more qualify for free shipping.) That's the lowest total price we could find by $4. It features a 3.5mm auxiliary input, twin stereo speakers, and requires 3 AAA batteries, not included. Deal ends August 1 at 1 am ET.