DailySale offers the Diamond Bluetooth Audio Receiver for Smartphones and Tablets for $19.99 with free shipping. That's the lowest total price we could find by $10. This device allows you to stream music from your smartphone, tablet, or other Bluetooth-equipped device to a receiver, car stereo, or any other audio equipment with a 3.5mm auxiliary jack.

Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.