Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe .
Link: Banggood product page
Coupon (163.99 USD): BG3503bc
Coupon (190.99 USD): 7bcdf9
(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): BGACNVM, BGwhielabel, BG680ef2
(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 Viomi VXKJ02 Smart Air Purifier [EU] is here.
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).