Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 13f142, BGJMP12, BGJMP13, BGJMP14, BGJMP15, BGJMP16, BGISJPS5, BGJMP17, BGJMP18, BGJMP19, BGJM5S79, BGJM5S15, BGEUJUS5, BGCNJUS5, BGEUJUMS5, BGCNJUMS5, BG5f325a, BG36b42a, BGASCN15, BGJUMIL5, 6GSGIT, BGJUQBS5, BGJULTS5, BGce27d1, BGBFJUMS5, BGAlerabatLP, BGS5JUM, BGJUS55, BGe7ad25, ADMITAD2212, 2022ACTIESNL, BGbde17a, Terence, BG67be9f, 2203ActiesNL, BG4867a0, 8Couponsde, MVC8SPRING, BG858972, 8BGwbg2204, tRaDetRaCKeR, BGd385c9, 8wEbgaInS5, pROMo8cuPoN, BG8ca609, BG3905df, BG6f792b, Cuponation9, BGd333be, BGfa82f6, BgGoodie9, BG535618
(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 Jumper S5 Laptop 14.1 N4020 12/256GB is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).