Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (549.99 USD): BGASUSZF76
Coupon (654.99 USD): 7d18f7
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Price history and price alert
Price history (for all/most countries) for ASUS ZenFone 7 ZS670KS 5G 6/128GB Snap865 is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).