Xiaomi Mi TV 4S 43Inch 2/8GB Android TV (Banggood, Aliexpress: Support bluetooth keyboard, Processor: 64-bit Quad Core, gamepad, 5G, RAM: 2GB, ROM: 8GB, WIFI: 2.4G, support for Dolby Audio/DTS, OS: Android TV 9.0, 3x HD port, Built-in for Google Assistant, Resolution: 3840x 2160 HDR, 2x8W speaker, Support DVB-T2/C, support voice control, Comes with bluetooth voice control remote, remote control, bluetooth: 4.2, 2x USB port, speaker, Ethernet: 100M LAN (the best price with coupon)).
Just check coupons out (with price alert and history). 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 and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
1. ($404.99): 7d18f7
2. ($404.99): BGAFF10OFF
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG01MiTV43, AFfbG10, BG02MiTV43, BG339MiTV43, BGBFCR03, 7bcdf9, BGX421, BG3285eb, Email5, BG248CZ1, BGMiTV32CZ1, BG248CZ, BG43TVGL1, BGMTV43, BGMITV4S43, BGYMTV4S43, BGYMITV4S43, BGYMITV43, 13f142
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi Mi TV 4S 43Inch 2/8GB Android TV [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Mi TV 4S 43Inch 2/8GB Android TV. The lowest price was: $269.77.
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)).