Tuya Smart Life 10A-125A 1P Smart Circuit Breaker (Banggood, Aliexpress: Rated Current: 10A/16A/20A/25A/32A/40A/50A/63A/80A/100A/125A (max), Product Item: Wifi Smart Circuit Breaker, Product Model: ZJSB9-80Z, Installation: Din Rail, Certificate: CE, Rated Voltage: 90-250V, Connection: WIFI 2.4G (the best price with coupon)).
Just check coupons out (with price alert and history). What is 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):
Banggood
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update.
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): BGSmart6, BGAlerabat1, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Tuya Smart Life 10A-125A 1P Smart Circuit Breaker. The lowest price was: $40.08.
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)).