Projection method Positive vote, battery 17100mAH, sound Harman Kardon original audio bluetooth wifi audio mode, 4K Native Resolution, model Play X, Compatible 2K, Resolution 1920*1080P, lumen 600-800 ANSI Lumen, Screen Size 100 Inch.
Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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. I have no active coupons for you right now.
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!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): TECH8%, f4e86d, PICODICOM, aff7off, BGXGPLAYX, bgssaff9, BGaDmITAd, bgchinafest, BGBINKUPON733, BGCITYADS2019, bGpAnDacHeCk, Email5, bGhOnEy10, BGdragonBoat, BGAFF7OFF, bgshOOp10, BgoFErTaSchInA10, 7bcdf9
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi XGIMI Play X DLP Projector? There we go. The lowest price was: $569.99.
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)).