Xiaomi Mi LYEJ02LM Bluetooth Headset White (Banggood, Aliexpress: Multifunctional On-cord Control / Built-in Mic / Bluetooth V4.1 HD Calls / Lightweight (the best price with coupon)).
You can create price alert here, copy coupons and view price history. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
1. ($13.69): 13f142
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 502C6B, TTxBG10, XM999, BGXMEE12, 2019SPEDM, aff7off, BG3CSUM, BGXMMIN, bgssaff9, AFfbG10, BGNEWEarphone, BG10OX, BGMT1X, BGCITYADS2019, BGVDay10%off, EARSP11, BGAFF10OFF, bGhOnEy10, BGIBUYILYV, BGXM18
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi Mi LYEJ02LM Bluetooth Headset ($-3)
2. Europe – Xiaomi Mi LYEJ02LM Bluetooth Headset [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Mi LYEJ02LM Bluetooth Headset White. The lowest price was: $5.99.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).