Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
15600mAh, 1000 lumens, 1000: 1 contrast ratio, Android 4.4, Native Resolution: 1280x 720
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 China.
Link: Banggood product page
1. ($663.84): BGPROBuscape
2. ($687.27): BGPROJEKTOR
3. ($702.89): BGAProjector
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Old coupons (from the oldest to the newest): BGaDmITAd, aff7off, BGCITYADS2019, bGpAnDacHeCk, Email5, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGAFF7OFF, bgshOOp10, BgoFErTaSchInA10, 7bcdf9, BGProjectors
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Wowoto S6A DLP Projector.
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)).