Aliexpress
Click here… to search for YEPO 737A6 6/128GB J3455 Laptop on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (239.99 USD): Wholesale20
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): A66G01, A66G015, BGYE122, BGA6128, BGA35168, BGYE5168, BGYE1168, BGYE73728, BG511222, BG5112221, BGYEO2, BGYEO3, BGYEO4, BGYEO9, BGYEO10
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for YEPO 737A6 6/128GB J3455 Laptop? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).