Patozon via Amazon offers Prime members the Mpow Cheetah Bluetooth Wireless Earbuds in Black for $29.99. Coupon code "X9A44OJ9" drops it to $24.99. With free shipping. That's the lowest total price we could find by $5. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.22.) They feature Bluetooth 4.1, microphone, and up to eight hours talk/play time.

They're also available for the same price in Blue via coupon code "85HUWHD5" or Green via coupon code "C9UPO8KA".