Basically copy coupon, view price history or create e-mail price alert. What is best price?
Wireless function, make your wireless coverage larger. Processor: QCA9533, Transmission rate: 300Mbps, Covering range: 200 meters, Wireless standard: Wireless N, Wireless AC, Wireless G
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($51.29): bGhOnEy10
2. ($51.29): BGdragonBoat
3. ($51.29): BGAFF10OFF
4. ($51.29): BgcLuBofErtA10
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): e2bcea, TTxBG10, 2019SPEDM, BGss506, bgssaff9, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGMPB2020, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi WiFi HomePlug.
Price records source(s): Gearbest, 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)).