Groupon offers the Munitio Nines 9mm Bullet Earbuds in Gold, Silver, or Black for $39.99. Coupon code "VISA5" cuts the price to $37.99. With free shipping, that's the lowest total price we could find by $39. Features include an Apple-certified 3-button control, 1-button control for Android, 20Hz to 20kHz frequency response, and 16-ohm impedance.