Aukey Direct via Amazon has its Bluetooth Stereo Sport Headphones for $29.99, but when you enter the code VROW3ZI6 the price drops to $16.99 Prime shipped. That's $13 off the regular sale price and the lowest we can find.

They feature the latest Bluetooth 4.1 technology and have a built-in microphone with noise cancellation technology. They're also sweat-proof, and the around-the-neck design "guarantees 100% stable and comfortable wearing experience for running." Also, it has up to 8 hours of talk time or 160 hours of standby with a full charge. Amazon customers gave it 4.4/5 stars. 

Next, Patozon via Amazon offers the Mpow Swift Bluetooth 4.0 Wireless Sport Headphones Sweatproof for $9.99 when you use the code R5I87BLP at checkout. That's $10 off the regular sale price and the lowest we've seen. They are sweatproof and universally compatible with most Bluetooth-enabled phones. The built-in extra-long battery allows for up to 5-hour talking/playing time and 185-hour standby.

Finally, Amazon has the TROND Edge Bluetooth 4.0 Sweatproof Sport Headphones for $29.99. Use the coupon code B8SU3BW3 to drop your total to $19.99 Prime shipped. That's $10 off the regular price and the lowest we can find. They have up to 7 hours of uninterrupted talk/playing time with one single charge and 6 days standby while paired due to the built-in high-density battery. Amazon shoppers gave them 4.5/5 star reviews.  Read more of this post