Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe . Only one coupon available!
Link: Banggood product page
Coupon (64.39 USD): TTBLACK5
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): ADMITAD2212, BGSmart6, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, 9OFFSUMMER, COUPONSDE1wk
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for ME80 Tuya WiFi Smart Thermostat Heating Temperature Controller [EU].
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).