100L Tactical Backpack [EU] (Capacity 70L / 100L(Expansion), Material Oxford Cloth+Polyester, Length 40cm / 15.75inch).
You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. 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
1. ($33.29): BG7280ff
2. ($34.77): BG00c906
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BGf98e0c, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGf4fa9d, 13f142, BG10OFFAFF1, BG4d9120, BGAlerabatod, 00c906, BGe46870
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $29.59.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).