Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
M5Stack M5Stack ESP32 Core Ink Development Kit mit 1,54\ | $57.55 | – |
 |
M5Stack M5Stack ESP32 Core Ink Development Kit mit 1,54\ | $57.55 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Internal Battery, Low Power Display, Built-in Magnet, 180 degree viewing angle, ESP32 Standard wireless functions WiFi /Bluetooth, Internal 4M Flash, Expansion ports, Expandable
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
1. ($39.97): BG589b2e
just apply this code 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): BG9f9f14, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for M5Stack ESP32 Core Ink Development Kit.
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)).