Storage M.2 2280 512GB PCIe SSD, GPU AMD Radeon™ Graphics (Graphics Frequency 1500 MHz), Processor AMD Ryzen™ 5 4500U / 6 Cores/6 Threads (Total L2 Cache 3MB / Total L3 Cache 8MB / Base Clock 2.3 GHz / up to 4.0 GHz), Video Output ① HDMI(4K@60Hz)，② DisplayPort(4K@60Hz) / ③ USB-C Port(4K@60Hz / In Front), Storage Expansion 2.5 inch SATA HDD Slot×2 (SATA 3.0 6.0Gb/s), Audio Output HDMI / DisplayPort / 3.5mm Audio Jack(Green), Wireless Connectivity M.2 2230 WIFI Support (Intel® WIFI6 AX200 / BT5.1 pre-install), Memory DDR4 8GB×2 Dual channel (SODIMM Slots×2), Ethernet ①1000Mbps LAN ②2500Mbps LAN.
Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
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 price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. I found coupon for you. Check this out.
Link: Banggood product page
1. ($399.99): BG3b9eb1
just apply this code 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): BG4d8318, 00c906, BG00c906, BGef96eb, BGaf4993, BG973af4, BG8671c0, BGbf5460, BG25d295, Kortings10, 2022ACTIESNL, BGc62c8f, BG3d9222, BG8936c6, Cuponation9, 9OFFSUMMER, BG4d956c, BgGoodie9, BG265501, BG3cf2b2, BG16646e, BG0bf87e
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Minisforum HM50 Ryzen 5 4500U 16/512GB Mini PC. The lowest price was: $399.99.
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)).