Ultrasonic Atomization Humidification, Applicable Area 25-30m2, Weight About 2100g, Working Decibel, Material ABS, Safety Protection, Model Number DEM-LD700, Voltage (V) 220V / 50Hz, Humidity Control Touch Type, ≤36dB, Automatic Water Shortage And Power Off Protection, Function, Capacity 4L, Power (W) 25W, Humidifying Capacity 280ml/h.
Just check coupons out (with price alert and history). You probably want to know what is the 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. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($84.21): BGYY001
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, f8aaf1, 919c60, BGDEER05, aff7off, bgssaff9, BGaDmITAd, 7d18f7, BGBFAFF2019, BGCITYADS2019, Email3, BG9NY, BGHOMEAPP, BGMPB2020, bGhOnEy10, Email5, BGSS10%SW, bgshOOp10, BGHome15%, BGHOMEA13, 13f142, BG10OFFAFF, BGwhielabel
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Deerma DEM-LD700 Humidifier 4L. The lowest price was: $58.35.
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)).