Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (14.48 USD): BGAudio9
(CouponsFromChina.com tip: coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGAudio3
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Bluetooth Headset Music Headband.
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).