E&C Store via Amazon offers the EnacFire Wireless Bluetooth Earbud for $25.99. Coupon code "28WDPC4B" cuts that to $17.93. With free shipping, that's $32 off list and the lowest price we could find. This water-resistant 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 chargers, five sizes of eartips, and carrying case.

Note: This deal is for a single earbud.