Aliexpress
Click here… to search for Xiaomi Youpin NSYP002 4Pcs Stationery Set 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 (47.05 USD): Terence
Coupon (47.05 USD): 2203ActiesNL
Coupon (47.55 USD): BG00c906
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): BGXMPEN, AFfbG10, BGNS952, BGNY952, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, 13f142, BGHONEY2110, BANGGOODSD, 00c906, ADMITAD2212, 2022ACTIESNL, Tabby20
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Xiaomi Youpin NSYP002 4Pcs Stationery Set is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).