BlueRigger via Amazon offers the Kinivo Bluetooth Hands-Free Car Kit with Aux Input for $35 shipped. It carries a list price of $60, but has never really sold that high. It’s typically priced at $40 and rarely goes on sale — this is the first time since last November.
There are absolutely other Bluetooth car kits you can buy for cheaper, but this model is worth the extra cash. It’s the best selling product of its kind on Amazon and has amassed a 4.5 out of 5 star rating from nearly 3,500 reviewers. It includes a built-in microphone and requires a 3.5mm Aux jack.