Aliexpress
Click here… to search for TRIGKEY Speed S3 Ryzen3 3200U Mini PC 16/500GB on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (239.99 USD): BG3f8fdc
Coupon (279.99 USD): BG2ed004
(CouponsFromChina.com tip: you should apply the coupon 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): BG1c7bf8, BG3e89e1, BG26be4f, 2022ACTIESNL, Tabby20, BG03c89e, 8wEbgaInS5, BGd9c3fe, pROMo8cuPoN, BG243df8, BGf16766, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, BGa563ea, 9OFFSUMMER, BGTKMN15OFF, BGTKMN20OFF, BG1bdf3f, BgGoodie9, BGdefa3c, BG589b2e, BGSaleFeb8, BG083a35
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for TRIGKEY Speed S3 Ryzen3 3200U Mini PC 16/500GB.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).