Just check coupons out (with price alert and history). You probably want to know what is the best price?
Connectors USB, Aspect Ratio 0.672916667, built-in, Android system, General, Picture Size 40-300, Image System DLP, Simplified Chinese, Pre/On Sale On Sale, Brightness Range 3000 to 3999 Lumens, Native Resolution 1080P (1920×1080), Model L6_H, Power Consumption 300, Languages Multi-language, Speakers Included Yes, Input Voltage 100-240, Video Format Resolution 1080P (1920×1080), Projection Distance 43469, Bulb Type LED, Brightness (lm) 3500, Features Pico, Digital Keystone Correction ±40°, Throw Ratio Range 1.52, Contrast Ratio 125.0006944
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($857.99): 7bcdf9
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): aff7off, BGaDmITAd, bgchinafest, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, BGMPB2020, Email5, bGhOnEy10, BGdragonBoat, BGAFF7OFF, bgshOOp10, BgoFErTaSchInA10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for JmGO L6_H DLP Projector.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).