Aliexpress
Click here… to search for SOTHING WT-F11 Negative Ion Air Conditioning Fan on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (43.84 USD): 2022ACTIESNL
Coupon (44.31 USD): BG00c906
(CouponsFromChina.com tip: put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGSOFAN1, PICODICOM, BGSOHUF, BGSOHFAND, 0e7f33, BGHOMEAPP, bGhOnEy10, bgshOOp10, BGHome15%, BGHOMEAPP13, BGHOMEA13, 13f142, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, 00c906, ADMITAD2212
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for SOTHING WT-F11 Negative Ion Air Conditioning Fan? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).