Just check coupons out (with price alert and history). What is the best price?
120 inch Display, for Android iOS Phones, Support WiFi, HDMI, Bluetooth, USB, TF Card, Audio Cable
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Universal Remote Control For Toumei Cocar C800S C800W C800A C800 C900 & Vankyo Passport M50 WiFi 4K HD 1080P Video LED Projector | $15.18 | – |
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.
Link: Banggood product page
1. ($341.27): BGPROBuscape
2. ($361.34): BGAProjector
put item in your cart and apply coupon code there 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): TECH8%, PICODICOM, Wholesale20, aff7off, BG3CSUM, bgssaff9, BGaDmITAd, BGGR193, bgchinafest, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, Email5, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGAFF7OFF, bgshOOp10, BgoFErTaSchInA10, 7bcdf9, BGProjectors
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for TOUMEI C800 Mini Pico Video Projector.
Price records source(s): Gearbest, 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)).