Just check coupons out (with price alert and history). Let’s see what best price is ATM.
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 and price update (UTC):
Dual Dynamic and Balanced Armature Drivers, 3.5mm Jack Wired Control, Microphone Phone Call
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($30.99): bgshOOp10
paste coupon code in your cart and click Apply 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): HybridP, ccd165, d59c42, 1513f8, ab3216, e2bcea, TTxBG10, BG3CSUM, BGXM184, AFfbG10, affbg10, BGXMPro1, 502C6B, BGCNXM4, BGBFAFF2019, BGCITYADS2019, BGXMHY299, BGXM3184, BGVDay10%off, BGXMHP01, EARSP11, BGXMHP88, BGAFF10OFF, BGTT10, bGhOnEy10, BGSS10%SW, BGELIG0920, BG11SHOP
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi In-ear Hybrid Earphones Pro.
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)).