Xiaomi Deerma DEM-F625 6L Air Humidifier (Banggood, Aliexpress: Noise, Power 25W, Rated Humidification 250 ml/h – 280 ml/h, Standard, Humidification mode, Size 196x 245 mm, Humidification Gear, Applicable Scene Household, Capacity 6L, Material ABS+PC, Application Area 21-30 ㎡, Sleep, Strong Humidification, Below 36db, Voltage 220V, Power Saving, Operation Method Knob Type, Color White, Model DEM-F625, Weight 1982g, 3 Gears (the best price with coupon)).
Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($51.66): BGHome15%
2. ($54.70): BGTT10
3. ($54.70): bGhOnEy10
4. ($54.70): BGSS10%SW
5. ($55.78): 7d18f7
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 and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): 502C6B, d8f2bb, f8aaf1, 919c60, BGDEER05, BGss506, bgssaff9, aff7off, BGaDmITAd, BGBFAFF2019, BGCITYADS2019, 2020CNY, BGVDay10%off, BGHOMEAPP, bgshOOp10
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Deerma DEM-F625 6L Air Humidifier. The lowest price was: $45.85.
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)).