I have just checked coupons. The lowest price I could get is $30.99 for AGSIVO 3000W 220V Instant Electric Water Heater Faucet (in Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
AGSIVO 3000W 220V Instant Electric Water Heater Faucet Tap Tankless LED Digital Display EU Plug for Kitchen Bathroom – Faucet with Hose
Latest price update (UTC time):
Banggood ($30.99)
Banggood warehouse is located in China. You probably want to know if this is a good price. Hmmm, price is higher than average (which is $26.62 right now), so better set price alert down below… I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Price without coupon: $31.99
1. ($30.99): BGfea7e7
apply it 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
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for AGSIVO 3000W 220V Instant Electric Water Heater Faucet is here.
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)).