Sony PIIQ Smooth Supra-aural Headphones for $18 + free shipping
Meritline offers the Sony PIIQ Smooth Supra-aural Headphones in Brown / Yellow, model no. MDR-PQ2/Z, for $34.99. Coupon code "MLC08035N" cuts it to $17.99. With free shipping, that's tied with our June mention and the lowest total price we could find by $15. They feature a 10Hz to 24kHz frequency response, 30mm drivers, and more. Coupon expires after 200 uses.
Supra-aural headphones have pads that sit on top of the ears, rather than around them. (The ones that encompass the ears are circumaural headphones.)