Projection Technology DLP, Ansi Lumens 1300 ANSI Lumens, Focus Auto Focus, Type 3D, Speaker 5W*2, Screen Scale 16: 9, Throw Ratio 1.1: 1, Display Technology 0.47DMD, Projection Distance 1M-7.5M, Model Number N7, Keystone Correction Auto Correction, Keystone Correction Vertical ±45°, Electric Focus, Projected Dimension 40-300 inches, Light Source LED, Optical Resolution 1920x1080dpi, Brightness 5000 Lumens, Keystone Correction Manual Correction, Contrast Ratio 8000: 1-9000: 1, Supportable Aspect Ratio 16: 9/4: 3, Brand Name JmGo, Power 135W, Horizontal ±45°.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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 coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($804.09): BGPROBuscape
2. ($851.39): BGAProjector
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 7bcdf9, BGJGN7, BGAFF7OFF, BGProjectors
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for JMGO N7 1080P DLP Projector is here. The lowest price was: $708.99.
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)).