Basically copy coupon, view price history or create e-mail price alert. What is best price?
RAM Type: DDR4, ROM: 64G, CPU: Amlogic S922X-H, Core: Hexa Core, Maximum External Hard Drives Capacity: 4TB, GPU: Arm Mali-G52 MP6, RAM: 4G, System: Android 9.0
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 Hong Kong. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($181.60): BG589b2e
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 502C6B, elec, BGBFAFF2019, BGCITYADS2019, bGhOnEy10, BGGTKP06, 7bcdf9, BGHALLOWEEN, BGBLGKP11, BGBLKP11YB, BG217991, BGJPGTK03, BGb2b9a4, BGJPBGTP, BGJPMNBGTKP, BG610e91, BGJPBGTK, BGJP8MFF, BGJP99TVC, BG807971, 2022ACTIESNL, BG6fd960, Tabby20, 2203ActiesNL, BG1efeb0, BG467191, BG8OFFCOUPON, TTBLACK5, JanBGCoupon8, BGSaleFeb8, BGSaleAD
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Beelink GT-King Pro 4/64GB TV Box.
Price records source(s): Gearbest, 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)).