Noise: ≤ 45dB, Fog Output: 300mL / h, Capacity: 5L, Use Area: 25㎡, Function: Ultrasonic atomization humidification, Water Tank Capacity: 250ml, Voltage: 220V, Material: HIPS, Power: 25W, Model: DEM-F628A.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($49.49): BGCuponation10
apply code in your basket (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): BGF28A, BGF628A, BGHOMEAPP, bGhOnEy10, BGHOMEAPP13, BGHOMEA13, BGDEF628A, 7d18f7
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Deerma DEM-F628A 5L Humidifier is here. The lowest price was: $31.99.
Price records source(s): Gearbest, 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)).