Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (13.29 USD): 13f142
(CouponsFromChina.com tip: apply it in your 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): BGHWAM, BGCITYADS2019, AFfbG10, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGSS10%SW, BGELIG0920, BG11SHOP, BG4BW25, BGLOAC1, BGa0b145
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Huawei AM115 In-ear Earphones.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).