Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 3 another warehouse/versions!
1. China – BlitzWolf Air Purifier Filter BW-AP2 (-3 USD)
2. Europe – BlitzWolf Air Purifier Filter BW-AP2 [EU] (-3 USD)
3. Europe – BlitzWolf Air Purifier Filter BW-AP1 [EU] (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (45.68 USD): BG1efeb0
Coupon (46.17 USD): Terence
Coupon (46.17 USD): 2203ActiesNL
Coupon (46.67 USD): BG00c906
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGBWFLCN, BGHOMEA13, 10%ForNewBW, BGAP1AP2CN, 10%ForBGBW, BG10OFFAFF, BGACZBWP2, BGwhielabel, BGHU0604, BGa1da8d, BGDC727, BGa066f4, BGHU0887, BG10OFFAFF1, BG7c4b2b, BGHU0972, BGDC0932, BG0c21c6, BANGGOODSD, 6GSGIT, BGbbec2b, BGHU1166, BGDC1136, BGDBD60, BGBFD41, BGHW132, BGe2b68d, BGHUA01, 00c906, BGa52fcf, BGPL1PC, BGHUA18, BGd3dca7, ADMITAD2212, 2022ACTIESNL, BGf2a6fd, BGHU0225B, BGa955a9, Tabby20, BGCCHU13, BGHU0418AA, BGJUNEGSG9, Cuponation9, BGAHPU13, BGbwbwbw01, BGBwwwwww01, BGLWRZESNIA6, BG8ReviTrage
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 3 another warehouse/versions!
1. China – BlitzWolf Air Purifier Filter BW-AP2 (-3 USD)
2. Europe – BlitzWolf Air Purifier Filter BW-AP2 [EU] (-3 USD)
3. Europe – BlitzWolf Air Purifier Filter BW-AP1 [EU] (-3 USD)
Price history and price alert
Do you need price history chart (for all/most countries) for BlitzWolf Air Purifier Filter BW-AP1? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).