Aliexpress
Click here… to search for Bominfit DB1 Dumbbells Set 2.5-24kg 15 Gear [EU] on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I don’t really know if this price is reasonable, coz there’s no price history in my DB. Well, there is one coupon available right now.
Link: Banggood product page
Coupon (179.99 USD): BG10OFFAFF1
(CouponsFromChina.com tip: just apply this code 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
It doesn’t make sense to generate price history chart, because there is one price record which is: 139.99 USD.
You can set price alert (for Banggood).