Aliexpress
Click here… to search for Deerma DX900 Vacuum Cleaner [EU] on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (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. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (57.41 USD): BGHOMEA13
(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
Old coupons (from the oldest to the newest): BGCZDRMDX9
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history is not available for this item (not enough database records)! The lowest price was 54.99 USD though.
You can set price alert (for Banggood).