Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
Coupon (14.09 USD): BG00c906
(CouponsFromChina.com tip: apply it in your 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): BG27c17f, Terence, Tabby20, 2203ActiesNL, 8Couponsde, BGac00f7, 8BGwbg2204, tRaDetRaCKeR, pROMo8cuPoN, BGJUNEGSG9, TTSUMMER8, Cuponation9
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for Vaydeer SZ2S01 Laptop Vertical Stand.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).