Aliexpress
Click here… to search for Xiaomi Necklace Bluetooth Earphones Young Version Black on 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 (39.09 USD): BGBRPL2
(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): ea9471, 5f8432, 797b4c, 4081e5, TTxBG10, BG3CSUM, AFfbG10, affbg10, 502C6B, BGBINKUPON795, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGXMNE01, EARSP11, BGAFF10OFF, BGTT10, bGhOnEy10, BGSS10%SW, bgshOOp10, BGELIG0920, BG11SHOP
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Necklace Bluetooth Earphones Young Version Black.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).