EngrepoDirect via Amazon offers the Engrepo Active Noise Cancelling Headphones for $39.99. Coupon code "AWKZ52WA" cuts it to $29.99. With free shipping, that's $40 off list and the lowest price we could find. It features folding design, in-line microphone, 40mm large-aperture drivers, 120mAh rechargeable Li-battery, airplane connector, and a carrying case. Deal ends October 1.