Amazon offers the iHome Reson8 Bluetooth Speaker System, model no. IBT30BC, for $64.86 with free shipping. That's $15 below our September mention and the lowest total price we could find by $35. (For further comparison, most vendors charge $126 or more.) Compatible with most Bluetooth-enabled devices, this speaker features 10 watts of built-in amplifier power, two full-range 2-5/8" midrange drivers, and a built-in lithium-ion battery.
Update: Note that this item is temporarily out of stock, but can still be ordered at this price for delivery when available.