E&C Store via Amazon offers the EnacFire Wireless Bluetooth Earbud for $21.99. Coupon code "2ZGFRXFI" cuts that to $14.95. Plus, Prime members receive free shipping. That's tied with our mention from a week ago, $35 off list, and the lowest price we could find. This earbud features Bluetooth 4.1, a built-in microphone, rechargeable Li-ion battery with up to six hours of music per charge, two wireless magnetic USB chargers, five sizes of eartips, and carrying case.
Note: This deal is for a single earbud.