Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi YDLYEJ03LM Sports Earphones Youth Black (-3 USD)
2. Europe – Xiaomi YDLYEJ03LM Sports Earphones Youth Black [EU] (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (15.99 USD): BGXMYA1
Coupon (15.99 USD): BGXMY721
Coupon (24.99 USD): BGXM012
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGXMYY299, cc466c, a35d2e, fca573, 9115d7, f9ecb9, b19aec, bflive3, d7c360, D7c360, e1b517, 59a736, aaed06, techfacts, 15XMBT, 16XMBT, 17XMBT, 9985c0, 18XMBT, 62b61e, 19XMBT, BGXMBT, 14XM99, BGXMYBT, BG377, BGEEXMY, BG13XMBS, BGEMXRRM, BGplyouth, BGXMYY1, BGCNXM8, BGXM165, BGXMEE77, BGXMQCIS, BG01XY, BGXMYY203, BGXMYY, 0e7f33, BGXMYY2, BGXM110, BGXYW8, BGXMFH01, FBCOUPON1, BGXMFH02, BGXMY96, BGXMY909, BGXMBD13, 13f142
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi YDLYEJ03LM Sports Earphones Youth Black (-3 USD)
2. Europe – Xiaomi YDLYEJ03LM Sports Earphones Youth Black [EU] (-3 USD)
Price history and price alert
Price history (for all/most countries) for Xiaomi YDLYEJ03LM Sports Earphones Youth White is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).