Aliexpress
Click here… to search for Baseus Washer High Pressure Hose Cleaner on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
Coupon (48.50 USD): BG10OFFAFF1
(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): BGBSWGC, BGBSWS, BGWGBS, BGGBAS, BGWGB, BGHOMEAPP, BGHCLE15, bgshOOp10, BGHome15%, BGHOMEAPP13, BGHOMEA13, 13f142, BG10OFFAFF, BGwhielabel
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Baseus Washer High Pressure Hose Cleaner.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).