Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (289.99 USD): BGKLP2055
Coupon (294.94 USD): BGPROBuscape
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Price history and price alert
Here is price history (for all/most countries) for Lenovo P2000 DLP Projector.
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).