Beelink SER3 AMD Ryzen 7 3750H 16GB DDR4 RAM 500GB SSD Windows 10 4K Triple Output Mini PC 1000M LAN USB3.0 Type-C Mini Computer Desktop PC – EU Plug.
You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($359.99): BG238a4d
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGfcfdae, BG0bdb00, BG1df224, BGAUGUST8, BGeb3b5e, BG920b85, BGBFDAY8
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Beelink SER3 Ryzen 7 3750H 16/500GB Mini PC. The lowest price was: $359.99.
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)).