That's a very expensive price for unassembled computer case with questionable aesthetics and missing many premium features of similarly priced products. I don't even think this is a good market fit. I don't think this case would be a good learning tool.
You don’t think there is a market fit and yet it’s already sold out? I am not defending the form factor or esthetics, but TE has a huge following and their products are usually very successful.
The market fit is existing TE fans that buy anything they make. Their page doesn't even say why you want this over something else or its functional features. Its not really a market product so much as low run TE fanservice. That's why it sold out - because they didn't make more than they expected to sell.
And if they profited from it, isn't that enough? There's a market, however small, and they produced enough. I would argue that TE knows its customers really well.
Its a bit like an art piece. Its like YouTubers writing novels or comic books and selling them to their existing audience. Is the money real? For sure. But they're really not competing with anyone in a market they're just relying on a small group of people who buy whatever they make. Good for them but not really interesting in its own merits.