Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (252.44 USD): BGPROBuscape
Coupon (267.29 USD): BGAProjector
(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): BGa2e3d0, 7bcdf9, BG3fa8cb, BGProjectors
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for WEJOY L9 1080P Projector 1/8GB.
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).