$16.99 – Tuya Wi-Fi Gas Leak Detector Natural Gas LPG Alarm Heat Sensor TFT LCD Display Remote Monitoring Home Safety – White.
I have just checked coupons. The lowest price I could get is $16.99 for Tuya Wi-Fi Gas Leak Detector (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is best price?
Latest price update (UTC time):
Banggood ($16.99)
Banggood warehouse is located in China. Low/high price? Current price is the lowest in history (according to CouponsFromChina database)! There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Price without coupon: $17.99
1. ($16.99): BGEUGASALM
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
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
Price history (for all/most countries) for Tuya Wi-Fi Gas Leak Detector is here. The lowest price was: $16.99.
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)).