Sonic Electronix cuts an extra 25% off headphones and earbuds via coupon code "25PREHDP", with prices starting from $18.72 after coupon. Even better, these items are all eligible for free shipping. Some best bets, each with prices after coupon:

• Nuforce NE-600X High-Efficiency In-Ear Headphones for $18.72 (low by $6)
• Grado SR80i Prestige Series On-Ear Headphones for $74.25 (pictured, low by $25)