$45.99 – Instant Water Heater 220V 3500W (Banggood, Aliexpress: Instant Water Heater 220V 3500W Mini Electric Tankless Hot Water Heater Bathroom Kitchen Washing LCD Display for Shower Bathroom – White EU (the best price with coupon)).
Latest update shows that Instant Water Heater 220V 3500W costs $45.99 (in Banggood). Just check coupons out (with price alert and history). You probably want to know what is the best price?
Latest coupon and price update (UTC):
Banggood ($45.99)
Banggood warehouse is located in China. Coupons for Instant Water Heater 220V 3500W? Nope, there’re no coupons in Banggood. Isn’t it too expensive? Current price is the lowest in history (according to CouponsFromChina database)!
Link: Banggood product page
Price: $45.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGaf452d
(these codes were not working in latest coupon update, but you can check them 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 Instant Water Heater 220V 3500W. The lowest price was: $45.99.
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)).