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.
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.
Updated:
Banggood
Warehouse in Hong Kong.
Link: Beelink GT-R R7 3750H 16/512GB Vega 10 Mini PC
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!
Additional Banggood coupons:
1. First page
2. Second page
Price history and price alert
Here is price history (for all/most countries) for Beelink GT-R R7 3750H 16/512GB Vega 10 Mini PC. 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)).