Aliexpress
Click here… to search for Xiaomi Guildford Aluminum Alloy Phone Tablet Holder Large 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 (19.19 USD): BG9a4d5b
Coupon (21.59 USD): BGHONEY2110
Coupon (22.99 USD): 13f142
(CouponsFromChina.com tip: this code has to be applied 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): BGXMCH10, TTxBG10, BG999CX, BG3CSUM, bgssaff9, AFfbG10, 15holders, 0e7f33, FBCOUPON1, BGAFF10OFF, BGCuponation10
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for Xiaomi Guildford Aluminum Alloy Phone Tablet Holder Large is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).