5V/7-28V Power Supply 8 Channel ESP8266 WIFI 8-way Relay Module ESP-12F (Banggood, Aliexpress: 1x 8-way Relay Module (the best price with coupon)).
You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
ESP8266 1/2/4/8/16 Channel Way Wireless Relay Module AC/DC 5V/7-28V/5-80V ESP-12F WIFI Development Board Power Supply | $1.77 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
1. ($15.12): BG00c906
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): ADMITAD2212, 2022ACTIESNL, Terence, 8Couponsde, MVC8SPRING, BGJUNEGSG9, TTSUMMER8, Cuponation9, BG589b2e
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – 5V/7-28V Power Supply 8 Channel ESP8266 WIFI 8-way Relay Module ESP-12F [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for 5V/7-28V Power Supply 8 Channel ESP8266 WIFI 8-way Relay Module ESP-12F. The lowest price was: $12.99.
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)).