Groupon offers the Sony Stereo Bluetooth Wireless Headset, model no. XBA-BT75, for $99.99 with free shipping. That's $29 under our February mention and the lowest total price we could find by $10. (For further comparison, we briefly saw a refurb for $45 less in May.) It features in-line volume control, microphone, armature driver, portable charging unit, and more. Deal ends July 8.