BuySonic offers the Harman Kardon Esquire Bluetooth Speaker for $179.99 plus $2 for shipping. That's the lowest total price we could find by $42. It features a frequency response of 80Hz to 20kHz, noise cancellation technology, dual drivers, custom tuned microphones, Bluetooth v2.1, play time of up to eight hours, and a three port power adapter. Deal ends October 30.