Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (1019.99 USD): BG13MAR2023
Coupon (1069.99 USD): BGf596f9
Coupon (1099.99 USD): BG5c365c
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): BGJUNEGSG9, BGee170f, BG2f0dc7, BG68d395, BGProj, BG589b2e, BGSaleFeb8, BGSaleAD, BGMARCHSALE
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Laser Cinema Full Color Projector WANOS 2/16GB.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).