As one of its daily deals, A4C offers the Motorola TX500 Bluetooth 2.1 In-Car Speakerphone for $14.95 with free shipping. That's tied with our expired mention from three days ago as the best price we've seen. (It's also a current price low by $15.) It features up to 45 hours of talk time, up to six months of standby time, ambient noise reduction, and connection to two phones simultaneously.