Brand GMK.
You can create price alert here, copy coupons and view price 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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($275.99): hoNEYbGdeAlS
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGGMKG, 7d18f7, BGKMGNB, BGKNBMG, 13f142, BGGMKNCB, BGCuponation10, BG7EBMN20, BG3c8c4a, BG7MN22, BG6dfcd7, BGf2daa3, BG0f10ce, BG72ee32, BG1f5e53, BGf487c4, BG796a87, BGISGMK1X, BG5d3bd9, BG678ad7, BG8a10e7, BG5b03d3, BGd6b158, BG8047ca, BG6c3060, BG9ea520, BGSLGMK11, BGbd477f, BGbaa8c1, BGf69121, 6GSGIT, BGa20f65, BGd8c0ea, BGMNPCX26, BGMNB5H6, BG992d4b, BGRBF141, BGedf654, BGBZGMN12, BG0215f1, 00c906, BG7dcb03, BGef96eb, BG3cfbbd, BGd3c08b, Kortings10, 2022ACTIESNL, BG0c921f, BGb62ab3, Terence, Tabby20, 2203ActiesNL, BG4eea42, CouponsdePC, BG379f46, BG0931e5, BG89d85e, BG0febb8, tRaDetRaCKeR, BG2f299d, 8wEbgaInS5, pROMo8cuPoN
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – GMK NucBOX J4125 8/512GB Mini PC [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for GMK NucBOX J4125 8/512GB Mini PC. The lowest price was: $199.99.
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)).