Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – SONOFF PIR2 Motion Sensor [EU/UK] (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (8.02 USD): BGSTHO15
Coupon (8.50 USD): BGAFF10OFF
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): elec, e2bcea, BG15Gadgets, SONOFF15, BG9NY, BGVDay10%off, BGTT10, bGhOnEy10, BGSMOFF, BGSONOFF15, BGELIG0920, 13f142, BgcLuBofErtA10, BGSONOFF16, BGCuponation10, BGHONEY2110, BG15Sonoff
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – SONOFF PIR2 Motion Sensor [EU/UK] (-3 USD)
Price history and price alert
Do you need price history chart (for all/most countries) for SONOFF PIR2 Motion Sensor? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).