Aliexpress
Click here… to search for BlitzWolf BW-FUN1 Foldable Stretchable Fan 7200mAh on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (36.99 USD): BGBWFAN
Coupon (36.99 USD): BGBWF7
(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): BGFUN106, 12blitzw, BGss10%bw, BGAPPLIANCE, BGalibuyFUN1, BGBWFAN11, BGkonimbesinFUN1, BGFYTFAN, BGITBWFAN, BGAPPLIANCE1, BGBWFUN1, BGALIBUYN01, BGRE34
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for BlitzWolf BW-FUN1 Foldable Stretchable Fan 7200mAh.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).