Walmart offers the Koss KSC75 Sport Ear-Clip Headphones for $12.26. (Amazon charges the same with free shipping for Prime members.) Choose in-store pickup to dodge the $4.97 shipping fee. That's the lowest price we could find by $3. They feature titanium-coated drivers, oxygen-free copper voice coils, a gold-plated 3.5mm plug, and frequency response range of 15Hz to 25kHz.