Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (279.99 USD): BG7EBMN7
(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): 7d18f7, BGCORBXP1, BGCORBXP2, BGSPSMN35, BGCuponation10, BGSprMN08, BGSPMN35S, 13f142, BGCBWC, BGCW04, BG3332c3, BG9d272e, BGPRCBP, BG1fe80b, BG23384f, BG7412f7, BGa2a9ea, BGe3863d
(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 CHUWI CoreBox Pro Mini PC i3-1005G1 12/256GB? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).