$19.99 – 3000W Fast Electric Water Heater Tap IPX4 Waterproof Instant Heating Multi-layer Coated EU Plug Kitchen Faucet – EU.
You can get 3000W Fast Electric Water Heater Tap for $19.99 using coupon code (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($19.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. The question is – is it a good price? Pretty sweet, this is the lowest price I have ever noted for this product!
Link: Banggood product page
Price: $19.99
Additional Banggood coupons: first page and second page
This is the best price ever noted in my database!
Old coupons (from the oldest to the newest): BG35a94a
(these coupons are old, so probably won’t work)
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
Price history (for all/most countries) for 3000W Fast Electric Water Heater Tap is here. The lowest price was: $19.99.
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)).