Altec Lansing MZX2071S Noise-Reducing Stereo Headphones w/ Mic for $9.99 shipped.  It is sold by 1saleaday through ebay.  Here is a screenshot for your reference.  It works with most mp3 players such as iPhone and iPod.  This set of headphones also comes with inline mic for conversation.  Most places have it for more than $45.