IP rating: 5ATM, RAM: 16MB, Charging Time: About 60mins, ROM: 40MB, Bluetooth Version: Bluetooth 5.0, Battery Capacity: 195mAh, Screen size: 1.2 inch, Operating mode: Touch Screen, Screen resolution: 390x 390, Waterproof / Water-Resistant: Yes, Standby time: 12 days, Screen: AMOLED, Model Number: GTR.
Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
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 and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
1. ($112.49): amazfit100
2. ($119.99): 7d18f7
paste coupon code in your cart and click Apply 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): BGGT42M, BGGTR42, AFfbG10, 8fbade, bggtr128, BGGTR129, BG11GTR42, BGGTR42119, BGGTR42JL, BGGTR109, BGGTR100, BGGTR11499, BGALIBUYTR, BGALIBUYAGT, Email5, BGFabioamaz
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Amazfit GTR 42mm Smart Watch. The lowest price was: $100.
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)).