Contrast ratio 3000: 1, Uniformity of illumination 70%, Physical Resolution 1920x1080dpi, Product Color White, Aspect Ratio 4: 3/16：9, Display Technology LCD display, Focus Manual, Max Compatible Resolution 4K (HMDI Mode）, Lamp LED, Nominal Brightness 6000 lumens, Throw ratio 0.75, Lamp Life 50000 hours.
Just check coupons out (with price alert and history). 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. ($252.44): BGPROBuscape
2. ($267.29): BGAProjector
apply code in your basket (cart) 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, BGANAK8, BGProjectors
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for AUN AKEY8 1080P Projector? There we go. The lowest price was: $248.39.
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)).