This Tanda Pearl Ionic Teeth Whitening System is just $124.25 at Overstock, and ships for free. That is the lowest price that we've found anywhere on this teeth whitening system by over $70! This system is enamel safe, and provides maximum whitening results with virtually no sensitivity. It includes the pearl mouth-tray device, 20 Ionic whitening gel tubes (0.17-ounce each), and a clamshell storage case. There is no sales tax (except UT).