Aliexpress
Click here… to search for Magicsee N5 Max S905X3 4/128GB TV Box on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (48.64 USD): elec
Coupon (49.05 USD): 7d18f7
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGBFAFF2019, BGCITYADS2019, edaab3
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Magicsee N5 Max S905X3 4/128GB TV Box.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).