As one of its daily deals, Best Buy again offers the Logitech Z520 Stereo Speaker System, model no. 980-000337, for $54.99 with free shipping. That's $5 under our mention from two days ago and the lowest total price we could find now by $49. Sales tax is added where applicable. These speakers feature 26 watts of power, 70Hz to 20kHz frequency response, 3.5mm auxiliary input, and more. Deal ends today.