Ending today, Groupon offers the Liger Blaze Sweatproof Bluetooth Headphones in Black for $34.99 with free shipping. That's tied with our mention from last week as the best price we've seen and a current low by $5. Features include built-in control buttons and mic, frequency response of 20Hz to 22kHz, passive noise isolation, two sizes of earbuds, up to five hours of playback, and Bluetooth 4.1.