Aliexpress
Click here… to search for Bakeey 360 Degree Rotation Long Arm Phone/Tablet Holder 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 (39.55 USD): BG8OFFCOUPON
Coupon (39.55 USD): TTBLACK5
Coupon (40.41 USD): BG00c906
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): BGc74980, BG852601, BGPHholder, BGf168a5, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for Bakeey 360 Degree Rotation Long Arm Phone/Tablet Holder is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).