Just check coupons out (with price alert and history). Best price?
movie, Light mode: highlight, Color gamut: NTSC 80 – 85 percent, Optical parameter, Auto mode: save power, Color temperature: standard, warm color, Throw ratio: 0.233: 1, Brightness uniformity: JBMA more than 80 percent, eye protect, Light source: ALPD 3.0, Display: 0.47 inch DMD, Projection parameter, cold color, Support resolution: 4K, Brightness: 5000 lumens, Model: MJJGYY02FM, Best project distance: 150 inch, Resolution: Full HD (1920x 1080), normal, Central contrast: 2500: 1 – 3500: 1
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 code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. There are no coupons for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGXM8130, aff7off, bGpAnDacHeCk, BGCITYADS2019, BGXMUSLASER, BGXMUSV, 7bcdf9
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi MIJIA Laser Projector Global Version US Plug [EU] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi MIJIA Laser Projector Global Version US Plug? There we go.
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)).