Huawei Honor V10 4/128GB Red (Banggood, Aliexpress: Type IPS FHD+ Display, CPU HUAWEI Kirin 970 Octa-core (4x 2.36GHz A73+ 4x 1.8GHz A53) +i7 processor, RAM 4GB, Display Size 5.99 inch, 403ppi, Card Extend Supports an external Micro SD card up to 256GB, Multi touch Yes, GPU Mali G72 MP12 767MHz, 10 points, ROM 128GB, Resolution 2160*1080, OS EMUI 8.0 (Based on Android 8.0) (the best price with coupon)).
Just check coupons out (with price alert and history). 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 China. One coupon is available. Cool!
Link: Banggood product page
1. ($352.99): 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): 11BGV10, BGaDmITAd, 7bcdf9, od7off, BGBFAFF2019, BGCITYADS2019
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Huawei Honor V10 4/128GB Red. The lowest price was: $289.99.
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)).