Latest update shows that 3000W Electric Intelligent Timing Heater costs $21.99 (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest coupon and price update (UTC):
3000W Electric Intelligent Timing Heater Boiler Water Heating Element Immersion Suspension Water Heater Bathroom Swimming Pool – Black
Banggood ($21.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. The question is – is it a good price? Looks like this is great price. I didn’t track lower than that in CouponsFromChina database ever.
Link: Banggood product page
Price: $21.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGa427f9
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
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 3000W Electric Intelligent Timing Heater.
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)).