Aliexpress
Click here… to search for Realme Pad G80 6/128GB 10.4 Inch Tablet on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (318.49 USD): Cuponation9
Coupon (318.49 USD): BgGoodie9
Coupon (321.99 USD): BG8ReviTrage
(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): 8BGwbg2204, BG6463a6, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for Realme Pad G80 6/128GB 10.4 Inch Tablet.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).