BuyDig offers the Sony In-Ear Wireless Headphones in Black, model no. MDRXB70BT/B, for an in-cart price of $39 with free shipping. That's $9 under our mention from two weeks ago and the lowest total price we could find now by $21. Features include 12mm drivers, 9-hour playback, Bluetooth and NFC streaming, and a 4Hz to 24kHz frequency response. Deal ends April 4.