Charging box output parameters 5V=0.25A, Communication distance 10m, Charging port Type-C, Wireless connection bluetooth 5.2, Charging box input parameters 5V═1A, Speaker impedance 32Ω, Product model M2103E1, bluetooth protocol bluetooth Low Energy / HFP / A2DP / AVRCP, Product net weight about 48g, Headphone input parameters 5V═0.12A.
Just check coupons out (with price alert and history). What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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.
Link: Banggood product page
1. ($152.99): BGAlerabatKL
2. ($152.99): BGAUDIO
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG6242e5, BGa91ff1, BGBuscape01, BGfad317, BG291e9e, BGaa249c, BGa0cafa, BG1f36f4, BGc245cb, BGBRPL2, BGcef425, BGHOTSHOP15
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi True Wireless 3 Pro M2103E1 ANC Earphones. The lowest price was: $108.99.
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)).