All4Cellular offers the refurbished BlueAnt S4 Voice-Activated Bluetooth Car Speakerphone for $24.95 with free shipping. That's $22 under our mention of a new unit from a year ago and $23 less than the lowest total price we could find for a new one today. This speakerphone can be set up with up to two phones and allows you to place and answer calls while driving using only your voice. Other features include access to information services, A2DP streaming, and up to 20 hours of talk time. Deal ends March 25.