You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Compatible 4: 3, Physical Resolution WHD/1920×1080 pixels, LCD Panel Size 5.2 inches, Color Uniformity 85%, Light Lifetime 50, Aspect Ratio (Original) 16: 9, White Light Lumens 2, Projection Distance 1.2~6.8 m @ 60″~300″, Lens Coated Fixed Lens, Optical Principle LCD + LED, Light Source Type LED Light Source Technology, Keystone Correction Vertical, Color Depth 1.07B Color (R/G/B 10bit), Contrast (Dynamic) 15, Power Source 60 Watt, Manual Focus, 000: 1, left and right electronic correction. ±25 degrees, Vertical Frequency 23 – 120Hz, Maximum Resolution WUXGA/1920×1200 pixels, Horizontal Frequency 15 – 102KHz, 500, 000 Hours, Throw Ratio 1.38: 1 (100″ @ 2.8m)
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. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($227.69): BGAProjector
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGAK7839, BGAFF7OFF, BgoFErTaSchInA10, 7bcdf9
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for AUN AKEY7 Projector 1080P 5800lm? There we go.
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)).