Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – GMK NucBox2 i5-8259U 8/256GB Mini PC [EU] (-3 USD)
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
Coupon (279.99 USD): BG22ce3a
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG30f635, 13f142, BG320a90, BG70aa8d, BG7EBMN19, BG8527a1, BG7SPEK12, BGf1259d, BG7MN21, BG497f35, BGad4b6b, BG49082b, BGa5afc0, BG5b11ad, BG4f2011, BG97e9c8, BG05faa8, BG8deedd, BGf229e3, BG34c4b8, BG68b8bc, BG557910, BGEEUGMK5, BG1f939b, BGacb199, BG24069b, BG60a5bb, 6GSGIT, BG4dea74, BGf8b56d, BG5d923d, BGb656e3, BG6bc1d4, BG2f0907, BG722041, 2022ACTIESNL, BG87a4f8, Terence, CouponsdePC, BGecd6fc, 2203ActiesNL, tRaDetRaCKeR, BG457ed1, pROMo8cuPoN, BG00c906, hoNEYbGdeAlS, BG716454, BGJUNEGSG9, BG8ReviTrage, Cuponation9, 9OFFSUMMER, BG32ddb6, BG0e9d3e, BgGoodie9
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – GMK NucBox2 i5-8259U 8/256GB Mini PC [EU] (-3 USD)
Price history and price alert
Do you need price history chart (for all/most countries) for GMK NucBox2 i5-8259U 8/256GB Mini PC? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).