PPI 412, ROM 128GB, NPU Dual NPU, 16.7M Colours, Type TFT LCD (IPS), Resolution FHD+ 2340*1080 pixels, CPU HUAWEI Kirin 980 Octa-Core (2*Cortex-A76 Based 2.6GHz+ 2*Cortex-A76 Based 1.92GHz+ 4*Cortex-A55 1.8GHz), GPU Mali-G76 720MHz, Display Size 6.26 inch, RAM 8GB, OS Magic UI 2.1.0 (Base on Android 9.0).
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Aliexpress
There’re some similar (or not) items on Aliexpress
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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.
Link: Banggood product page
1. ($372.99): Email5
2. ($372.99): bgshOOp10
apply code in your basket (cart) 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): BGHH20, aff7off, 7bcdf9, od7off
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for HUAWEI HONOR 20 8/128GB is here. The lowest price was: $341.99.
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)).