Aliexpress
Click here… to search for MINIX NEO N42C-4 4/32GB Mini PC on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
Coupon (313.73 USD): elec
(CouponsFromChina.com tip: apply it 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): 502C6B
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for MINIX NEO N42C-4 4/32GB Mini PC is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).