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
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
System: Android 7.1, Processor: RK3328, GPU: Mali-450MP2, 2GB RAM, 16GB ROM, AV, DC 5V, HDMI, IR, OTG, TF card, USB3.0
Price history and price alert
Here is price history (for all/most countries) for Ugoos UM4 2/16GB TV Dongle.
Price records source(s): Gearbest
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)).