All4Cellular offers the refurbished BlueAnt S4 Voice-Activated Bluetooth Car Speakerphone for $19.95 plus $2 for shipping. That's $3 under our March mention of a refurb and the lowest total price we've seen. (It's also $8 less than the lowest total price we could find for a new one.) 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 June 3.