Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (591.49 USD): Cuponation9
Coupon (597.99 USD): hoNEYbGdeAlS
Coupon (597.99 USD): BG8ReviTrage
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): tRaDetRaCKeR, 8wEbgaInS5, BGMNFU01X, pROMo8cuPoN, BGJUNEGSG9, BG42e3f0
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for NVISEN FU01 i5-1135G7 Xe Mini PC 16/512GB? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).