Inateck via Amazon offers its Inateck Mini Bluetooth Streaming Music Adapter, model no. BR1001, for $13.99. Coupon code "DCGEFVBM" cuts it to $8.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.01.) That's $3 under our April mention, $21 off, and the lowest total price we've seen. It features a 3.5mm port, Bluetooth 3.0, and signal range up to 33 feet. It allows any stereo to receive a Bluetooth signal.