Just check coupons out (with price alert and history). You probably want to know what is the best price?
Display core Intel lris Xe GPU 80EUs, SSD Support 2.5 inch HDD up to 2TB, Wireless WIFI6 -802.11ax, Wireless Type Intel AX201, RAM 16GB*1 DDR4 /3200MHz / support up to 64GB 3200MHz, CPU Intel Core i5-1135G7, Brand GMKTEC, Type NucBox5, Ethernet Network Support RJ45 1000M*1, Core Quad-Core Four Threads 4MB Cache /2.0GHz / Up to 2.9GHz, Operating System Windows11 Pro, Hard Drives Capacity 512GB NVMe SSD / support up to 2TB, Power Supply Charge Adapter, Bluetooth BT-5.2
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.
Link: Banggood product page
1. ($591.49): Cuponation9
2. ($597.99): hoNEYbGdeAlS
3. ($597.99): DealBGimpact
4. ($610.99): BG00c906
apply code in your basket (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): CouponsdePC, BG4291bd, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for GMKTEC NucBox2 Plus i5-1135G7 16/512GB Mini PC? There we go.
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)).