Basically copy coupon, view price history or create e-mail price alert. Best price?
Microsoft Windows 10 64 Bit OS, Intel Gemini Lake N4100 Quad Core 2.4GHz, Intel HD Graphics 600 GPU, 11.6 inch 10-point Touch FHD Screen, 4GB LPDDR4 RAM for Advanced Multitasking, 128GB SSD ROM Storage Capacity
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: $-3
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 585134
(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 KNote 5 4/128GB Tablet is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).