Amazon offers Prime members the Panasonic Retro Monitor Stereo Headphones in Black, model no. RP-HTX7-K1, for $29.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.59.) That's the lowest total price we could find by $10. Features include 40mm drivers and a 3.9-foot cord.