Aliexpress
Click here… to search for Xiaomi Deli 71073 Electric Pencil Eraser on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (13.15 USD): 8Couponsde
Coupon (13.29 USD): Terence
Coupon (13.29 USD): 2203ActiesNL
Coupon (13.43 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)
Old coupons (from the oldest to the newest): BGXE659, BGXED659, AFfbG10, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, BgoFErTaSchInA10, BgcLuBofErtA10, BGHONEY2110, 13f142, BANGGOODSD, 00c906, ADMITAD2212, 2022ACTIESNL, Tabby20, BG1efeb0
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Deli 71073 Electric Pencil Eraser? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).