>>83435527TL;DR: It's branded merch.
All branded merch has a markup.
This is high-quality branded merch.
Even high-quality branded merch still has a markup.
Longer story: It's good coffee. Whether you should buy it depends what level of coffee nerd you are. If you care a whole lot about your coffee, you probably either (a) live in a place where you have a local roaster you like, and just buy from them, or (b) don't live near a roaster and you already have a favorite that you order from.
If you care a lot about your coffee and SOMEHOW aren't (a) or (b), then I think I could justify $20 regularly for the beans? Maybe up to $25 for a less-frequent purchase.
If you feel like buying something that you would buy anyway in life (fancy coffee) and also feel like donating $10 to your oshi and her crew, then yeah, go for it.
If you "like coffee", but normally buy $10 bags from the grocery store, and you know how to prepare coffee (you at least own a burr grinder not spinning blades), you might be surprised and enjoy these beans. But also you probably wouldn't be the type to make a $35 bag a regular purchase, even if it was $25, based on the coffee itself.
So even if it is quite good, either of it partially as merch, or don't buy it.