Newegg offers the refurbished JBL Reflect Mini Lightweight In-Ear Sport Headphones in Teal for $5.99 with free shipping. That's $8 under the price of a new pair. (For further comparison, it's $15 under our May mention of a new unit.) Features include: frequency response of 10kHz to 22kHz in-line remote / microphone 5.8mm dynamic drivers reflective cable sweat-proof Note: a 90-day warranty is included, however it's unclear who backs it.
One grocery chain is likely to save you more money than any other.