Aliexpress
Click here… to search for HDPE Sunshade Net 3x4m [EU] on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. There’s only 1 record in my database, so I have no idea if the price is OK.
Link: Banggood product page
Coupon (44.76 USD): BGb8519d
Coupon (49.50 USD): BG589b2e
(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
Not enough data to show price history chart… 44.76 USD is the only recorded price. It was not cheaper than that since we have saved it in DB.
You can set price alert (for Banggood).