43.99 USD – that is current price with coupon for ZigBee 3.0 (in Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Latest coupon and price update (UTC):
Banggood (43.99 USD)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it a reasonable price for this item? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 41.64 USD)
Link: Banggood product page
Price: 43.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG796580, BGf60638, BGHUOG668, BGESFOUR668, BG277904, BGcou927, BG375bc4, BGbc1718, BG6d5b55, BG4b2595, BGSmart6, BG460948, BGHU1829, BGHU1835, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BG77bf2e, BGd8ce4e, BGJUNEGSG9, BGHU2172, Cuponation9, BG803cd3, BG8ReviTrage, BGcoupon8off, BGGutscheine, BGb21748, BGSaleFeb8, BG962699, BGe30c4b, BGa733b7, BGb6769b
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
Click here… to search for 4 pcs. BlitzWolf BW-SHP13 ZigBee 3.0 Smart WIFI Socket 16A on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 4 pcs. BlitzWolf BW-SHP13 ZigBee 3.0 Smart WIFI Socket 16A.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).