Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
512GB M.2 2280 SATA SSD ROM, AMD Ryzen 3 3300U Quad Core 2.1GHz, Radeon Vega 6 Graphics GPU, 16GB DDR4 RAM 8+8 Dual Channel
Aliexpress
There’re some similar (or not) items on Aliexpress
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 China. I couldn’t find any coupon for this product on latest product update.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGMN9D08, bGhOnEy10, BGSEDK, BGUM3MF, BGMNSF11, BG11MN03, BGMNBK12, BGMN33U, BGCBOX5, BGDKMN3, BGDK205, 7d18f7, BGDKM20, BG3CUM, BGMNDK, BGSPUMS, BGMDNK, BGMUM3, BGSPUMF, BGSPUMD, BGKS12, BGKUF20, BGUM30MN, BGMSF205, 13f142, BGCuponation10, BGM205SF, BGNBXUM, BG898ee6, BG01b6df, BG6a5ecb, BG7EBMN6, CouponsdePC, BG0d97b1
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – MINISFORUM DeskMINI UM300 Ryzen3 3300U 16/512GB Vega6 Mini PC [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for MINISFORUM DeskMINI UM300 Ryzen3 3300U 16/512GB Vega6 Mini PC is here.
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)).