Aliexpress
Click here… to search for 12V Car High Pressure Water Sprayer Washer [EU] on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. Uhm… There’s no price history (in my database) for this product right now. Only one coupon available!
Link: Banggood product page
Coupon (42.49 USD): BG123F2021
(CouponsFromChina.com tip: coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGEEUTOOL1, BGHONEY2110, BGPower15off, 13f142, BG931bb3, BG123FBR
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
It’s a new item in our database, so I can’t create price history chart. We have saved this price in database: 37.99 USD.
You can set price alert (for Banggood).