All4Cellular offers the Sound ID 512 Bluetooth Headset in Black for $19.95 with free shipping. That's tied with our mention from three weeks ago as the lowest total price we've seen. (It's a current price low by $41.) Features include three microphones, noise canceling and noise reduction, up to five hours of talk time and 135 hours of standby, settings adjustments via the EarPrint app for Android or Blackberry, and USB. Deal ends September 13.