Riversong Global via Amazon offers its Riversong Raindrop Magnetic Bluetooth Headphones in several colors (Black pictured) for $19.99. Coupon code "8BYGFTIT" cuts it to $9.99. Plus, Prime members receive free shipping. That's $4 under our October mention, $30 off list, and the lowest price we could find. These sweat-proof headphones can connect with up to two devices simultaneously and feature CVC noise cancellation, Bluetooth 4.0 with a 33-foot range, in-line controls and microphone, up to six hours of play-time per charge, and magnetic earplugs.