150 inch super-large screen / large projection size, High-fidelity audio / dual full-frequency + dual high frequency / DTS certification, Diffuse reflection imaging reduces visual fatigue and makes viewing more healthy, 4K picture / TI DLP digital light processing technology, Eight-point correction / more accurate picture adjustment, Ultra short-focus / 0.23: 1 throw ratio / free wiring, The picture is vivid / 3000: 1 contrast.
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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
1. ($1818.99): BGPROBuscape
2. ($1925.99): BGAProjector
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGKE43428, BGKFMKG, 7bcdf9, BGKGFP, BGKGFPJ, BGESA428, BGKEAE432, BGASZDT
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Fengmi 4K Cinema Laser Projector 2100lm EU [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Fengmi 4K Cinema Laser Projector 2100lm EU. The lowest price was: $1729.99.
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)).