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 (32.99 USD): BGX1232
Coupon (33.99 USD): BG836112
(CouponsFromChina.com tip: just apply this code 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): BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGVCCD13, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10, BGELIG0920, BgcLuBofErtA10
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for X12 5.1 inch 8GB Game Console is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).