You can create price alert here, copy coupons and view price history. Best price?
Charging interface: Type-C, Battery capacity: 165mAh, Charging time: About 2 hours, Product name: Xiaomi bone conduction earphone, Audio Protocol: SBC/aptX/aptX Adaptive, Wireless connection: bluetooth ™ 5.2, Endurance: About 12 hours, Communication distance: 10m (barrier-free open environment), bluetooth Protocol: A2DP/AVRCP/HFP 1 HSP, bluetooth name: Xiaomi Earphones Explore
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):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
1. ($156.39): BGAudio3
this code has to be applied 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): BG9ba0e8, BG87c9a1, BG1b5830, BGXIFD188, BGSaleFeb8, BGSaleAD
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for Xiaomi Bone Conduction Earphones Explore is here.
Price records source(s): 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)).