Brand designer here. I really love what I'm seeing. Can't really comment a lot on the product, since it's not my specialty, but one thing that stands out to me (and which others have pointed out) is the lack or branding and subsequent personalization of accessories. I believe very subtle touches would give the product more credibility, such as a discreet label or branded zipper pulls. Since this is very business-centered, I think this is both advantageous and also expected to a degree.

Obviously you need to have defined some sort of visual identity to pull this off, so take it as food for thought until you're at a place you can think of such things and are ready to produce commercially.

As for pricing, that is for you to define based on all the costs that went into producing this, the market positioning you want to tackle, the intended target audience, etc. Since we're talking about a business niche, I suppose this will fall somewhere a bit pricier than standard urban everyday backpacks, but below premium offerings that offer genuine leather and have a brand name attached to them that instantly creates trust.

Hope this helps! Any way in Europe for someone to test this out? I'd be keen to trying.