Basically copy coupon, view price history or create e-mail price alert. What is the best price?
RAM 64GB, 2.5D, 76.7% screen-to-body ratio, Display Size 5.5 Inch FHD AMOLED Display, OS Android 7.0, 3000mAh battery, ROM 4GB, 500nits brightness, Over 100% NTSC high color gamut display, GPU Qualcomm Adreno 506, CPU Qualcomm Snapdragon 625 Mobile Platform with 14nm, 64-bit Octa-core Processor, Built-in, with fast charging, Bluelight filter for eye care, Type AMOLED capacitive Screen, Resolution 1920×1080 pixels, Corning Gorilla Glass 5
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 Hong Kong. There are no active coupons for this product, but the price is pretty low isn’t it?
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): ZD552KL, plfonall, Zen4pl
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Hong Kong – ASUS ZenFone 4 Selfie Pro ZD552KL 4/64GB Gold ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for ASUS ZenFone 4 Selfie Pro ZD552KL 4/64GB Red.
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)).