Aliexpress
Click here… to search for Alldocube VBook Laptop 13.5inch N3350 8/256GB on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (275.99 USD): BG1efeb0
Coupon (278.99 USD): 2203ActiesNL
(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): BGADVB7, Email5, BGADVB8, BGADVB9, BGADVB10, 7d18f7, BGADVB11, BGADVB12, BGADVB13, 13f142, BGADVB15, BGADVB16, BGADL02, BGADVB17, BGADVB19, BGADVB20, BGTFR70R, BGADVB21, BGADVB22, BGADVB23, BGADVB24, BGADVB25, BGADVB26, BGADVB27, BGADVB28, BGADVB29, BGADVB30, BGADVB31, BGVBK080, BGVBK082, BGADVB32, BGADVB33, BGADVB34, BGPHAD80, BGADVB35, BGADVB36, BGADVB37, BGJPAD13S, BG902a68, BG70fbe3, BGISAD3K, BGc92a60, 0.00, BG386e5c, BGAlerabatLP
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Alldocube VBook Laptop 13.5inch N3350 8/256GB is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).