Deal Chaser via Amazon offers Prime members the Pyle Stereo Bluetooth Headphones in Black (pictured), Green, or Orange, model no. PHBT5B, for $19.99 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise it adds $6.39.) That's the lowest total price we could find by $12. They feature a frequency response of 24Hz to 24kHz, 10 hour use time, and built-in microphone.