Aliexpress
Click here… to search for Broadlink BestCon MCB1 Smart Switch [EU] on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I can’t tell you if this price is good – not enough records in my database, so I won’t judge. We have found one coupon for this product!
Link: Banggood product page
Coupon (5.26 USD): BGSmart6
(CouponsFromChina.com tip: this code has to be applied 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): BGBLMCB1, BgcLuBofErtA10, BG15SH12, 13f142, BGAFF10OFF, BGSTHO15, BGded8d5, BGHONEY2110, BGed9fbe, BGSHOM15, BGe0b95a, 6GSGIT, BG81cd52, BGD11070, BGf8dce8, BGB5081, BG3c1bfb, BG6579cf, BG360c64, ADMITAD2212
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
There is only one database record (it was for 5.26 USD), so you can’t see price history chart.
You can set price alert (for Banggood).