$9.96 – SONOFF SNZB-03-ZB Motion Sensor (Banggood, Aliexpress: Dimension: 35X39X28mm, Battery: 3V(CR2450);, Wireless protocol: ZB (IEEE 802.15.4);, Material: PC; (the best price with coupon)).
Latest update shows that SONOFF SNZB-03-ZB Motion Sensor costs $9.96 (in Banggood). You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($9.96)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. What about the price? From what I can see this price is higher than average price ($7.16).
Link: Banggood product page
Price: $9.96
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGSONOFF15, BGSNZB03, BgcLuBofErtA10, BGSONOFF16, BGSTHO15, BGHONEY2110, BGSHOM15, 13f142, 6GSGIT, pROMo8cuPoN, BGJUNEGSG9, BG15Sonoff, TTSUMMER8, Cuponation9, 9OFFSUMMER, BG6edee4, BGfac6fd
(these codes were not working in latest coupon update, but you can check them out anyway)
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
Check out price history chart (for all/most countries) for SONOFF SNZB-03-ZB Motion Sensor. The lowest price was: $4.99.
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)).