Best Buy offers the refurbished LG Tone Pro Wireless Bluetooth In-Ear Behind-the-Neck Headset in Black or Blue, model no. HBS-770, for $19.99. Choose in-store pickup to avoid the $5.49 shipping fee. That's $20 under the lowest price we could find for a new unit. It features Bluetooth 4.1, up to 16 hours of play time, dual microphones, and SMS reading.

Note: No warranty information is provided.

Update: It's only available via in-store pickup.