Xiaomi JSQLX01DY 360L Filter for Humidifier (Banggood, Aliexpress: Rated total net water volume: 360L, Product model: JSQLX01DY, Recommended replacement cycle: 2-3 months, Product size: 1 50x 60x 60mm, Product net weight: 0.2kg (the best price with coupon)).
Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($13.15): BG00c906
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 and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGSMOFF, 13f142, bgshOOp10, BGSAMRTH, BgcLuBofErtA10, BG15SH12, BGSTHO15, BGHONEY2110, BGSHOM15, BGSHE15, BG10OFFAFF1, BANGGOODSD, 00c906
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi JSQLX01DY 360L Filter for Humidifier? There we go. The lowest price was: $11.89.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).