Aliexpress
Click here… to search for Xiaomi Philips CM-999 Faucet Filter Water Purifier on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): e2bcea, vipupgrade8, Faucet12, TTxBG10, AFfbG10, BG3571, BGBFAFF2019, BGBFCR43, Email3, BGHOMEG12, BGfaucet, bGhOnEy10, BGYJ001, bgshOOp10, BGHWDEALS888, BgoFErTaSchInA10, BgcLuBofErtA10, 7d18f7, 13f142, BGCuponation10, BGHONEY2110
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Philips CM-999 Faucet Filter Water Purifier? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).