MEElectronics M9-SL Sound-Isolating Headphones with Microphone for $8.32.  Shipping is free on orders over $25.  If needed, use this Filler Tool to pad the order to qualify for free shipping.  Here is a screenshot for your reference.  The headphones are compatible with iPod nano, iPod touch, iPhone, blackberry models, and most mobile phones with a 3.5mm jack.  It features in-ear design for passive noise reduction and anti-frustration clear coated cable.Most places have it for about $17.