You can get SONOFF ZBMINI L2 Extreme Zigbee Smart Switch for $15.99 using coupon code (in Banggood). Check coupons or create price alert down below. Best price?
Latest price update (UTC time):
SONOFF ZBMINI L2 Extreme Zigbe Smart Switch Two-Way No Neutral Wire Timer Remote Control eWeLink Support Alexa Google Home
Banggood ($15.99)
Banggood warehouse is located in China. I have no active coupons for you right now. I think you want to know if the price is good. My database says that it’s pretty good price, coz average is $22.19.
Link: Banggood product page
Price: $15.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Aliexpress
There’re some similar (or not) items on Aliexpress
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 ZBMINI L2 Extreme Zigbee Smart Switch.
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)).