CENAVA F158G 15.6inch i3-6157U 8/128GB Notebook (Banggood, Aliexpress: 8GB DDR4 RAM 128GB Expandable SSD, 0.3MP Webcam for Video Chatting and Meeting, 15.6 inch 95% Ratio IPS Screen with 1920x 1080 Resolution, Backlit Keyboard with Number Keys, Windows 10 OS Installed, Intel HD Graphics 550 GPU 600MHz Frequency, Intel Core i3-6157U Duad-Core Four Thread 2.4GHz (the best price with coupon)).
Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
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 and price update (UTC):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
1. ($474.19): 13f142
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): Email5, BGCENI3, 7d18f7
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for CENAVA F158G 15.6inch i3-6157U 8/128GB Notebook. The lowest price was: $299.99.
Price records source(s): 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)).