Get coupons, create price alert or check price history out! You probably want to know what is the best price?
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):
Lamp Life 30, External Subtitle Supported Yes, Throw Ration 0.233: 1, Video Formats avi/mpg/dat/vob/div/mov/mkv/rm/rmvb/mp4/mjpeg/ts/trp/wmv/asf/flv, RJ45, Picture Formats JPG/PNG/BMP, HDMI, 4: 3, Display type DLP, USB, WiFi, Brand JMGO, Image Size 100 – 500 inch, SPDIF, Contrast Ratio 1500: 01: 00, Image Scale 16: 9, WIFI 802.11 b/g/n/ac, Built-in Speaker Yes, Projection Distance 0.1 – 0.5m, Bluetooth Bluetooth 4.0, Brightness 1500LM, DVB-T, Bluetooth, Material Aluminum Alloy, Power Supply 100-240V, Noise (dB) 30dB, 3D Yes, Speaker, Xbox, Compatible with Sony PS4, Native Resolution 3840 × 2160, Function 3D, Model X3, Interface 3.5mm Audio, Audio Formats mp3/aac/wma/rm/flac/ogg/mpeg audio/ac-3/dts/mpeg-1/amr/cooker/pcm/ogg vorbis, DVB-T Supported No, 000h, Resolution Support 4K
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($1319.99): 7bcdf9
apply code in your basket (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): aff7off, BGJGX3, BGaDmITAd, bgchinafest, BGCITYADS2019, bGpAnDacHeCk, BGMPB2020, Email5, bGhOnEy10, BGdragonBoat, BGAFF7OFF, bgshOOp10, BgoFErTaSchInA10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for JmGO X3 DLP Projector.
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)).