JBL offers its refurbished JBL Everest 710 Bluetooth Headphones in Silver or Gun Metal for $69.99 with free shipping. That's the lowest price we could find for a refurbished pair by $10. They feature a 25-hour battery life and 10Hz to 22kHz frequency response. Note: A 1-year JBL warranty applies.
This simple preventive measure takes just seconds to perform.