Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
[Android OS] ThundeaL PG500 Full HD 1080P Projector Portable WIFI Android Projector 2K 4K Video Home Theater Movie Cinema Big Screen Beamer – EU Plug
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. I can’t find any active coupons for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG589b2e, BGsaleSaS, BGSaleFeb8, BGSaleAD, BGa5e78e, BGMARCHSALE, BGProjcc, BG194a55, BG66949d, BGce5aeb
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for ThundeaL PG500 1080P Android 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)).