ATM you can buy GMKTEC NucBox K2 7735HS Mini PC 32/512GB Mini PC for $570.39 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
GMKTEC NucBox K2 AMD Ryzen 7 7735HS Mini PC 32GB RAM 512GB SSD Octa Core WIFI6 BT5.2 HDMI Type-C 4K Triple Display Windows11 Pro Mini Computer – Black
Latest coupon code price check (UTC time):
Banggood ($570.39)
Banggood warehouse is located in China. Low/high price? From what I can see this price is higher than average price ($488.94). You can get coupon down below.
Link: Banggood product page
Price without coupon: $619.99
1. ($570.39): BGALL8
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): BGCAPITALOS8, BGCOUPERT8, BGBFDAY8, BGc1a647, BG7d7fac, BGHOBBY081
(probably won’t work, but you can try them out)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for GMKTEC NucBox K2 7735HS Mini PC 32/512GB Mini PC.
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)).