Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe . I found coupon for you. Check this out.
Link: Banggood product page
Coupon (44.73 USD): BG589b2e
(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): BGACZXMP1, BGwhielabel, BGc884b1, BGfc3ed1, BGS100, BGDC0939, BG228743, BG0271a7, BGc21923, BGHU0225C, BGa6930e, BGDC0309, BG1efeb0, BGfdfa51, BG7c9599, Cuponation9, 9OFFSUMMER, BGAHPU13, BG8ReviTrage, BGeaf456, BG1018j, TTBLACK5
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Xiaomi Mijia Air Purifier Filter Enhanced S1 Green [EU] is here.
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).