Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Newest GMUI 3.0 base on Android 6.0 system, 700 ANSI Lumens and the newest RGGB quad-channels light road makes color more saturated, 2GB DDR3 RAM + 8GB eMMC Internal storage, Support AI voice function, Ultra clear 1080p FHD display, Mstar 6A838 Cortex-A53 64bits Quad-core CPU with Mali-T820 MP4 GPU makes the video smoothly
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.
Link: Banggood product page
1. ($467.99): BGCITYADS2019
2. ($483.59): aff7off
3. ($483.59): bgchinafest
apply code in your basket (cart) 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): BGGMZ6, BGaDmITAd, BGBFAFF2019
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for XGIMI Z6 Projector CN? 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)).