Aliexpress
Click here… to search for BlitzWolf BW-SS7 ZigBee3.0 2300W 1 Gang Smart Light Switch Module [EU] on Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – BlitzWolf BW-SS7 ZigBee3.0 2300W Smart Light Switch Module 2 Gang (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. I don’t really know if this price is reasonable, coz there’s no price history in my DB. There is one coupon right now! Check this out.
Link: Banggood product page
Coupon (21.24 USD): BGSmart6
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): BGBWSS7L, BgcLuBofErtA10, BG15SH12, BGBWSS7, BGSS7BRB, BG1BWSS7, 10%ForNewBW, BGSTHO15, 10%ForBGBW, BGHONEY2110, BG7e9fa8, BGbd9387, BG9ca159, BG61e0ae, BGSHOM15, BG414b08, BGSHE15, 13f142, BGTYSE857, BG5262a9, 6GSGIT, BGD11009, BG3f3209, BGB5009, ADMITAD2212
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – BlitzWolf BW-SS7 ZigBee3.0 2300W Smart Light Switch Module 2 Gang (-3 USD)
Price history and price alert
Well, you won’t see price history chart, coz we have only 1 database record for this item (and price was 14.99 USD).
You can set price alert (for Banggood).