This Damson Audio Twist Portable Wireless Bluetooth Speaker drops from $79.99 to $59.99 to $49.99 at World Wide Stereo when you use coupon code TWIST during checkout. Plus, shipping is free! This was the lowest price we found by $10. Though not a household audio name, this speaker gets good reviews online. It streams music from Bluetooth enable devices such smart phones, tablets and laptops, and it can run cordlessly on a rechargeable battery for up to 9 hours. Sales tax is charged in most states.