Altec Lansing UHP336 Snugfit In-Ear Earphone for $19.99.  Note this is Amazon's Lightening Deal so click on "View Gold Box offer" to see the price.  It expires at 2pm PDT on 9/28 and while supplies last.  Here is a screenshot for your reference.  Shipping is free on orders over $25.  If needed, use this Filler Tool to pad the order to qualify for free shipping.  This earphone features passive noise reduction and high fidelity.  Most places have it for about $84 or more.