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 (2789.07 USD): aff7off
Coupon (2789.07 USD): bgchinafest
(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): TECH8%, d138f1, PICODICOM, BGXGLune4K, BGaDmITAd
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for XGIMI Lune-4K Projector.
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).