$53.99 – SONOFF NSPanel WiFi Smart Thermostat Wall Switch White (Banggood, Aliexpress: SONOFF NSPanel WiFi Smart Thermostat Wall Switch EU US Temperature Display All-in-One Remote Controller with Alexa Google Home – EU Plug (the best price with coupon)).
I have checked all old coupons and price is $53.99 for SONOFF NSPanel WiFi Smart Thermostat Wall Switch White (in Banggood). Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
Latest coupon code price check (UTC time):
Banggood ($53.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. But wait a sec… Is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $52.15)
Link: Banggood product page
Price: $53.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGb0d0b9, BGREUPSNF3
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – SONOFF NSPanel WiFi Smart Thermostat Wall Switch White [EU] ($51.99)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for SONOFF NSPanel WiFi Smart Thermostat Wall Switch White. The lowest price was: $49.79.
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)).