Storage 512GB M.2 NVMe PCIe 4X 2280 SSD 1900MB/S, Storage Extension2 Support up to 1TB 2.5 inch SATA hard drive(not include), WIFI 2.4G/5.8G / 802.11 b/g/n/ac/ax wifi6, Instruction Set 64bit, CPU AMD Ryzen™ 7 3750H / Quad-Core 8 Threads / 2.3Ghz UP TO 4.0Ghz / Cache 6MB, Lithography 12nm, LAN 1000M, Type Mini PC, Model GT-R, Bluetooth Bluetooth 5.0, Brand Beelink, Storage Extension1 M.2 SATA3 2280 SSD slot, OS Windows 10, Graphics Radeon™ RX Vega 10 Graphics 1400 MHz, RAM 16GB (SO-DIMM DDR4 2400MHz) / Support Up to 64GB.
Just check coupons out (with price alert and 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. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon 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/i1u
Old coupons (from the oldest to the newest): BG928bd3, 6GSGIT, BGca8a97, BG679dc4, BGef96eb, BGec383e, BGe88b63, BGd05e2c, BGcdf3e3, 2022ACTIESNL, BG822fbc, BG360f26, BG6d6853, hoNEYbGdeAlS, BGJP6MNBK04, BGb2a987, BGJUNEGSG9, DealBGimpact, Cuponation9, BG516158, BGc137db, BG56e5f2, BGf8b44e, BG70b4f5, BGce11bc, BG3834fe, BGa1381c, BGca8b4c, BG1d2dc2, BGa9731a, BGfe646d, BGc0a3ef, BGCAPITALOS8, BG32256b, BG2d37bf, BG300254, BG16ed12, BGNEWYEAR8, BGc48694, BGHONEYSP
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for Beelink GT-R R7 3750H 16/512GB Vega 10 Mini PC is here. The lowest price was: $309.
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)).