I have just checked coupons. The lowest price I could get is $130.68 for Xiaomi Amazfit T-Rex Smart Watch Global (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Charging Type: Magnetic charging, Width: about 22mm, Length: about 200mm, Charging Time: About 2hours, Bluetooth Version BT 5.0, Using time: About 20days, Battery Capacity: 390mAh, Size: 1.3 Inch, Resolution: 360*360pixels, Standby Time: About 66days, Type: AMOLED, Material: Silicone
Latest coupon and price update (UTC):
Banggood ($130.68)
Banggood warehouse is located in Hong Kong. Price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $77.79) I found coupon for you. Check this out.
Link: Banggood product page
Price without coupon: $142.04
1. ($130.68): BGALL8
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): amazfit100, BGTREX137, BGTTREX, e05655, BGGTG, BGGTG127, BGBSTX01, BGTRE119, BGTR116, BGAMAREX, BGTRBR, BGTM5, BGJPATX0, BGJULYREX, TREX95, BGamazfitEU, BGAZCZ, BGAZTR, BGALIBUYTRX, BGTRE117, BGDQREX, TREX92, BGOCREX, BGREX92, BGHALLOWEEN, BGTREX117, BGTREX114, BGAZES, Email5, BGESREX, BGABST104, BGTX90, BGREXCZ, BGREXES, BGTXDS, BGFabioamaz, BGtechtoTRex, BGRXBR, BGJPN3TREX, BGREX89, BGTRexIT, BGATRPL, BGTREX21, BGTEX20, BGREX22, BGREX23, BG03TX80, 13f142, BGba59a2, BG24d260, BGc78970, BG46278e, BG91d465, BG224925, BGfeed31, BG11412c, BGHKREX8, BG3a0724, BGJPAMAZ, BGSWATCH10, BG2635ef, BG5e67d3, BGf6710f, BGaef81e, 6GSGIT, BG00cec3, TTBLACK5, BG284c49, BGMARCHSALE, BGHONEYSP, BGESJY8
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 4 another warehouse/versions!
1. Hong Kong – Amazfit T-Rex Smart Watch Camouflage Green ($-3)
2. China – Amazfit T-Rex Smart Watch Army Green ($-3)
3. China – Amazfit T-Rex Smart Watch Light Khaki ($-3)
4. Europe – Amazfit T-Rex Smart Watch [EU] ($-3)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Amazfit T-Rex Smart Watch Global? There we go.
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)).