Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Original Green Xiaomi Mi Air Purifier 2 Filter Enhanced Version [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (93.50 USD): 8Couponsde
Coupon (93.50 USD): MVC8SPRING
Coupon (95.53 USD): BG00c906
(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
Old coupons (from the oldest to the newest): BGair1S, bgchinafest, BGnowyfiltr, BGBFAFF2019, BGCITYADS2019, BGHOMEAPP, BGMPB2020, bGhOnEy10, BGAFF7OFF, BGSS10%SW, bgshOOp10, BGXMfilterS1, BGHome15%, BGHOMEAPP12, BGS1XMCZ, BG9XMfilterS1, BGHOMEAPP13, BGXMS1CZ, BGXMFLS1, BGHOMEA13, BGMJAP11, BGS1APFCZ, BGXMS1FLCZ, 13f142, BGAPEHGD, BG10OFFAFF, BGwhielabel, BG6a088e, BG2dd9ee, BG10OFFAFF1, BANGGOODSD, BG9dc3df, 00c906
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Original Green Xiaomi Mi Air Purifier 2 Filter Enhanced Version [EU] (-3 USD)
Price history and price alert
Price history (for all/most countries) for Original Green Xiaomi Mi Air Purifier 2 Filter Enhanced Version is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).