Ending today, Groupon offers the factory-refurbished Samsung Radiant360 R1 Bluetooth Speaker, model no. WAM1500, for $79.99. Coupon code "SALE3" drops it to $71.99. With free shipping, that's $13 under our refurb mention from two weeks ago, the best deal now by $27, and the lowest total price we've seen. It features 14 watts of output, a 3.6" woofer, 1" dome tweeter, Bluetooth 4.0, and tap and swipe speaker controls. A 90-day Samsung warranty applies.