You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
GPU Radeon™ RX Vega 10 Graphics (Graphics Frequency 1400 MHz), Storage Expansion 1×2.5 inch SATA HDD Slot (SATA 3.0 6.0Gb/s), Processor AMD Ryzen™ 7 3750H / 4 Cores/8 Threads (Total L2 Cache 2MB / Total L3 Cache 4MB / Base Clock 2.3 GHz / up to 4.0 GHz), Memory DDR4 8GB×1 Dual channel (SODIMM Slots×2), Storage M.2 2280 256GB PCIe SSD, Wireless Connectivity M.2 2230 WIFI Support (Intel® WIFI6 AX200 / BT5.1 pre-install), System Windows 10 Pro
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG8bbb9e, BG69ea15, 7bcdf9, BG67da35, BGUM700256G, BG7d5ae9, BGHU1046, 6GSGIT, 00c906, BGe82555, BGef96eb, BG0cce2b, BG808646, BG3f4bee, Kortings10, 2022ACTIESNL, BG1c5777, BG01e1e2, BG0202ac, BG2b6f41, BGac13ff
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Minisforum UM700 3750H 8/256GB Mini PC.
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)).