Aliexpress
Click here… to search for 100L Tactical Backpack [EU] on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
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 (33.29 USD): BG7280ff
Coupon (34.77 USD): BG00c906
(CouponsFromChina.com tip: apply it 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): BGf98e0c, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGf4fa9d, 13f142, BG10OFFAFF1, BG4d9120, BGAlerabatod, 00c906, BGe46870
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history is not available for this item (not enough database records)! The lowest price was 29.59 USD though.
You can set price alert (for Banggood).