1x Chinese Certificate, Package Contents: 1x Dehumidifier, 1x Chinese Manual, 1x Power Cord.
Basically copy coupon, view price history or create e-mail price alert. What is 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 price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($39.55): BG1efeb0
2. ($39.98): Terence
3. ($39.98): 2203ActiesNL
4. ($40.41): BG00c906
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): 502C6B, CS10M, PICODICOM, BGDEER05, aff7off, bgssaff9, BGaDmITAd, BGDERDHR, BGDER10M, BGDERCS, BGVDay10%off, BGAHOFF, BGHOMEAPP, bGhOnEy10, BGDEM10, BGDEMCS, BGSMCSM, BGSS10%SW, BGCS10M, BGCS10DM, bgshOOp10, BGHome15%, BGCS10MT, BGCS10MES, BGHOMEAPP13, BGCS10MCZ, BGHOMEA13, BGCS10M11, BGDMCS10M, BGDEMCS10M, BGCZCS10M, 13f142, BGCuponation10, BG10OFFAFF, BGwhielabel, BGe76282, BGDC722, BG952439, BG295ea8, BG10OFFAFF1, BG138ef1, BGa7b685, BGDC0913, BGcf3414, BG951b85, 6GSGIT, BGf523ac, BG3649d4, BGDC1111, BG95bc63, BGHW08, BG21d711, 00c906, BG8f9aa5, ADMITAD2212, 2022ACTIESNL, Tabby20
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Youpin Deerma DEM-CS10M Mini Dehumidifier [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Youpin Deerma DEM-CS10M Mini Dehumidifier. The lowest price was: $20.99.
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)).