I paid the $60 from ebags. I'm not sure if it will pop up again at that price. I expect it will at some point. I don't think I'd pay $90 for this bag as a DIY project.
It's not, but the Cabela's bag is built for outdoor use. I'm not hard on my equipment, so material isn't a huge concern for me unless someone expects me to pay a premium price for it. Aside from the bottom needing to be dipped, I think it should hold up well.
One thing I want to emphasize is that I think this bag is feature-heavy closer to a disc golf bag than Cabelas. The side pockets are wide and spacious (jackets could fit in them too). There are a ton of pockets, a specific pencil pocket, mini pocket, etc. Cabela's works great, don't get me wrong. I think this is just close to a Grip in how it's set up. The Cabela's is a Flak-type bag.
Well, I'm a bit of a nut for these. I just Google image search a lot and dig deeper into bags I think might work. New backpacks get released all year long, so things pop up a lot. Sports bags, fishing bags, hiking bags, etc. tend to work better for what we do.