JBL offers its refurbished JBL Everest 110 In-Ear Headphones in Steel Blue or Gunmetal for $19.99 with free shipping. That's $25 under the best price we could find for a new pair. They feature:

Bluetooth 4.1

8-hour rechargable battery

3-button remote with microphone

10Hz to 22kHz frequency response range

Note: A one year JBL warranty is provided.