Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Hong Kong – Xiaomi Redmi 10C Snap680 4/128GB (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (153.79 USD): Cuponation9
Coupon (153.79 USD): BgGoodie9
(CouponsFromChina.com tip: apply code in your basket (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): tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, DealBGimpact, COUPONSDE1wk
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Hong Kong – Xiaomi Redmi 10C Snap680 4/128GB (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Redmi 10C Snap680 4/64GB.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).