Amazon offers the MEElectronics M9 Hi-Fi Sound-Isolating Headphones
in Black, model no. M9P-BK, for $9.02
with free shipping
. That's the lowest total price we could find by $11, although we saw them for $1 less (in silver) last week (since expired). They feature a 20Hz to 20kHz frequency response, 3.5mm plug, and 4-foot cord.