Display Size 6.21 inch 19.5: 9, Li-Polymer Battery, 3400mAh (Typical Value), RAM 4GB, CPU HUAWEI Kirin 710 Octa-core, OS EMUI 9 (Android 9.0), ROM 128GB, Resolution 2340*1080, Type FHD+ Capacitive Touch Screen.
Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
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 price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($311.13): Email5
2. ($311.13): bgshOOp10
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/i1u
Old coupons (from the oldest to the newest): 4BGE9S, affiliate6, od7off, BGBFAFF2019, BGCITYADS2019, BGMPB2020
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for Huawei Enjoy 9S 4/128GB Black is here. The lowest price was: $229.99.
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)).