Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Doogee N20 Pro 6/128GB [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. One coupon is available. Cool!
Link: Banggood product page
Coupon (168.99 USD): 13f142
(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): bgshOOp10, BGDGN20P, Email5, 7d18f7, BGHU0326, BGCuponation10
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Doogee N20 Pro 6/128GB [EU] (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for Doogee N20 Pro 6/128GB.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).