Ebay offers Bose Ultra Open Earbuds, Certified Refurbished for $137 (reg. $299) with free shipping. 

Product Description:

A brilliant combination of innovative open ear design, incredible audio, and all-day comfort. You’ll never stop your music to hear the world again.

• Immersive Audio: Spatialized Sound puts you in the music.
• OpenAudio technology: Rich, high-quality, private sound.
• SimpleSync: Pair seamlessly with Bose smart soundbars and speakers.
• Go ahead, listen longer: Up to 7.5 hours of play time (up to 4 hours with Immersive Audio or Auto Volume)¹ or up to 48 hours of standby,³ and up to an extra 19.5 hours of battery life in the charging case.⁴
• Bose app: Take personalization even further with Adjustable EQ settings in the Bose app. Control bass, mid-range, and treble levels as you go.
• Bluetooth multipoint connectivity: With multipoint connectivity, you can seamlessly connect to two devices simultaneously via Bluetooth, allowing you go from Zoom meetings to your Spotify playlist without missing a beat.