Price history, coupons and price alert are available on this page. What is best price?
Auto focus NO, Native Resolution 1080p, Throw Ratio 1.4: 1, Aspect Ratio 16: 9 / 4: 3, Keystone Correction Yes, Material ABS, Display Type LCD, Contrast Ratio 2500: 1, Brightness 4000 Lumens, Projection Distance 1.8-10m, Resolution Support 1080p, Image Size 55-280 inch, Model CL770
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($213.17): BGPROBuscape
2. ($225.71): BGAProjector
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): BGCE607, aff7off, BGaDmITAd, BGCL607, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, Wholesale20, Email5, bGhOnEy10, BGdragonBoat, BGAFF7OFF, bgshOOp10, BgoFErTaSchInA10, BGAFF10OFF, 7bcdf9, BGProjectors
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Cheerlux CL770 1080p Projector is here.
Price records source(s): Gearbest, 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)).