All4Cellular offers the HMDX Portable Speaker System in Pink for $4.95. Coupon code "A4C1A1" drops it to $4.70. With $2 for shipping, that's tied with our November mention and the lowest total price we could find by $3. It features an inner mesh pocket for your device, zipper closure, and compatibility with any smartphone or MP3 player that has a 3.5mm headphone port. It requires two AA batteries (not included). Coupon expires January 11.