HYSTOU S200 Mini PC i5-8300H 8/256GB (Banggood, Aliexpress: CPU Intel Core i5 8300H, Hard Drives Capacity 128GB/256GB, Socket 2*204 pin SO-DIMM, Technology Dual Channel DDR4, RAM 8GB, support ultra HD 4K resolution, Cache 9MB, Chipset Intel Kaby Lake single chip, GPU Intel UHD Graphics 630 (the best price with coupon)).
Just check coupons out (with price alert and history). 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 price update (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($430.55): BGCuponation10
apply it in your cart 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): BGMASH, aff7off, Email5, 7d18f7
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for HYSTOU S200 Mini PC i5-8300H 8/256GB. The lowest price was: $305.99.
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)).