$21.99 – SNZB-01 Wireless Switch, Wireless Connections: IEEE 802.11 b/g/n 2.4GHZ, Zigbee 3.0;, Support Sub-devices: BASICZBR3 Smart Switch, Dimension: 62X62X20mm, S31 Lite zb Smart Plug, Material: PC V0;, SNZB-02 Temp. & Hum. Sensor, SNZB-04 Wireless Door/Window Sensor., SNZB-03 Motion Sensor, Input: 5V 1A;.
ATM you can buy SONOFF ZB Bridge Smart Bridge Zigbee3.0 Remote Controller for $21.99 (in Banggood). Check coupons or create price alert down below. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood ($21.99)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. What about the price? From what I can see this price is higher than average price ($12.05).
Link: Banggood product page
Price: $21.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGSONOFF15, BGSONOFFZBB, BGSNZBBZ, BGESSONOFF1, 13f142, BGVKSOZB, BgcLuBofErtA10, BGHU0147, BGZB13, BGSNZBBR, BGSONOFF16, BGAFF10OFF, BGSTHO15, BGSON149, BGHONEY2110, BGSHOM15, BGSHE15, BG93de6d, 6GSGIT, BGSmart6, BGHU1717, 8BGwbg2204, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9, BG15Sonoff, BG8ReviTrage, Cuponation9, 9OFFSUMMER, BGd187f7, BG2f6dea, BGf6926e, BGb02ae3
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for SONOFF ZB Bridge Smart Bridge Zigbee3.0 Remote Controller. The lowest price was: $8.99.
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)).