You can create price alert here, copy coupons and view price history. What is best price?
Maximum flow 1.8-3L/Min, Plug Standard EU Plug (220V) / US Plug (110V) / AU Plug (220V) (Option), The nozzle diameter 0.15mm~0.2mm, Standby Pressure 20Mpa, Power 1800W, Pressure Resistance Of High Pressure Pipe 25Mpa, The best spray distance 35-50cm, Maximum Pressure 20Mpa, Package size Approx. 40x45x45cm/ 15.75×17.72×17.72″, Using Pressure 15Mpa
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. This is new product in my database, so I don’t know if this price is good. There is one great coupon!
Link: Banggood product page
1. ($203.99): BGHPT15
paste coupon code in your cart and click Apply 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
Old coupons (from the oldest to the newest): BG015bcb, BGGines, BGHID18, BGPHOOL8, BG51943, BG5fbd5b
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history is not available for this item (not enough database records)! The lowest price was $181.99 though.
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)).