OnePlus 6T 8/128GB Mirror Black (Banggood, Aliexpress: GPU Adreno 630, Card Extend Not support, 10nm, OS Android 9.0, Aspect Ratio 19.5: 9, Resolution 1080x 2340 pixels 402ppi, DCI-P3), ROM 128GB UFS 2.1 2-LANE, within AIE, RAM 8GB LPDDR4X, up to 2.8 GHz), Display Size 6.41 Inch, Type Optic AMOLED (Support sRGB, CPU Qualcomm Snapdragon 845 (Octa-core, Cover Glass 2.5D Corning Gorilla Glass 6 (the best price with coupon)).
You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
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 Europe.
Link: Banggood product page
1. ($369.99): BGOP6T8128
2. ($469.99): affiliate6
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): 11BGR6P4, 11BG6T8, BG116T8, 6T11BG8, 12bgop5, 12MCOP6T8, 1BGOP6T2, Alibuy9137, 1BGOP6TA, 2BGOP6TB, 62ca20, 3BGOP6T, JPBG128W, koninimbesinop6t, f262fb, JPBG128h, plfonall, 19BGOP6T, 4OP6T, 4bgop6t, 5BGOP6T, bg845, BG5OP6T, BG6Tplus01, BGDJOP6T, BGOP6T527, BGONE11, BG20%OFF, BGOP6T8, BGOP6T8G, aff7off, BGOP6T628, BGOP6TIL, bgssaff9, BGletni16T, BGOP6T79, BGOP20, BGOP6T719
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for OnePlus 6T 8/128GB Mirror Black? There we go. The lowest price was: $369.99.
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)).