Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
More on Aliexpress…Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (399.99 USD): BG12ROG128
Coupon (446.39 USD): od7off
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGASROG18, BGaDmITAd, 7bcdf9
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for ASUS ROG Phone ZS600KL 8/128GB Black is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge.
You can set price alert (for Banggood).