Very fancy cases can be custom manufactured in Italy, China and Germany to name some that I have noticed.
Extremely large, elaborate , high end "looking", massive cases can be had for less than $1000. More expensive than anything that needs to go into the case. CNC makes one off and low volume case buying and selling a reasonable proposition.
But cases don't contribute much to the performance. They are primarily part of the "audio jewelry" axis of categorization.
The question to ask might be how does it compare in price to gear that does the same thing. Maybe RME or Hilo Lynx or Okto Research.
These are examples of products that have measured well here and don't seem (to me ) to be unreasonably priced.
I am not a socialist when it comes to audio equipment pricing. If someone takes the trouble to engineer , build and sell an excellent product, they deserve to profit from it. The question for the potential buyer is how much bang are you getting for your buck. Is your hard earned dollar going to pay for actual hardware and production cost or is it going for slick advertising, high dealer margins and also greedy margins for the manufacturer.
I used to like to read sales and marketing materials when I worked in the retail end of the industry. On the one hand, the companies tried to tell the consumer how great their gear was. The same companies, sent the dealer and their sales reps , three ring binders with tables to show how much margin they would make selling at various price points. Of course ones sales commission sometimes was affected by these tables. This affected my respect for some brands that were clearly just intended to cause money flow. I found the experience distasteful and I still occasionally get into arguments with people about particular brands especially if they bought them once upon a time, somewhere. There were and probably still are brands that give the consumer a better value for their dollar. It does not appear to me that Lumin falls into this category.