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 (36.45 USD): BGAHPU13
Coupon (38.13 USD): Cuponation9
Coupon (39.39 USD): BG00c906
(CouponsFromChina.com tip: apply code in your basket (cart) 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): BGJUFO53, BGwhielabel, 13f142, BGIS953, BG10OFFAFF1, BGTYOC953, 6GSGIT, 00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, DealBGimpact, 9OFFSUMMER
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for SOTHING S1 Desktop Electric Fan 2000mAh.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).