Aliexpress
Click here… to search for XGIMI N20 DLP Projector 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 (781.48 USD): BGAFF7OFF
Coupon (831.30 USD): 7bcdf9
Coupon (833.30 USD): Email5
Coupon (833.30 USD): bGhOnEy10
(CouponsFromChina.com tip: you should apply the coupon 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): 52226c, PICODICOM, aff7off, BGaDmITAd, bgchinafest, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, BGCL001, BGdragonBoat, bgshOOp10, BgoFErTaSchInA10, BGAFF10OFF
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for XGIMI N20 DLP Projector? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).