Aliexpress
Click here… to search for PS-100A 30L Ultrasonic Cleaner [EU] on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. I’m not sure about the price, coz I have only 1 record(s) in my database. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (266.15 USD): BG564c1f
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Price history and price alert
There is only one database record (it was for 266.15 USD), so you can’t see price history chart.
You can set price alert (for Banggood).