Xiaomi Mi9T Pro 6/128GB Global Blue (Banggood, Aliexpress: Resolution 2340*1080 Pixel, Display Size 6.39 Inch AMOLED, GPU Adreno 640, ROM 128GB, Game Turbo Yes. 2.0, RAM 6GB, OS MIUI 10, Battery(Built-in) 4000mAh(typ), 3900mAh(min), (1×2.84GHz + 3×2.42GHz + 4×1.80GHz), MI Turbo Yes, AIE 4th Generation AI Engine, 7nm, Kryo 485, CPU Qualcomm Snapdragon 855 Octa Core (max to 2.84GHz) (the best price with coupon)).
Go down and check coupons out. Remember to check price history if it is available. What is 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 and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. There is one great coupon!
Link: Banggood product page
1. ($442.99): Email5
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BG19TP, BG29TP8, BGM9TP128, BG9TP128, BG9TP1UU, BG9TP50, BG9TPRO, BGMI9TEU3, BG9TP6, BGplmi9tp128, BG9TPCL, BG9TPCL2, BG9TP128U7, BG9TPCL3, BG9TPCL4, BGMI9TPRO128B, BG9TP6D, BG109TP, BG119TP, BG9TRGG, BG9TP6128, BG9TP855, BGD119TP855, BGHU503, BGPL119TPRO128, BG59T128, BGBFX9T128, BGBFSP9TP, BG9TPEE, BGD129TP, BG129TPBR, BG29TP, BG29TPCL
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 3 another warehouse/versions!
1. Hong Kong – Xiaomi Mi9T Pro 6/128GB Global Black ($-3)
2. Hong Kong – Xiaomi Mi9T Pro 6/128GB Global Red ($-3)
3. Hong Kong – Xiaomi Mi9T Pro 6/128GB Global White ($-3)
Price history and price alert
Price history (for all/most countries) for Xiaomi Mi9T Pro 6/128GB Global Blue is here. The lowest price was: $329.99.
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)).