Panasonic offers its Panasonic Water-Resistant Sport Clip Earbud Headphones, model no. RP-HS34M, in four colors for $29.99. Coupon code "CLIPS" cuts it to $19.99. With free shipping, that's the lowest total price we could find by $10. They feature a quick-fit adjuster, smartphone controller, microphone, and 10Hz to 25kHz frequency response.