I dont know too much about the topic, only what I've seen in highend "gun rooms" and on TV where they show them making highend guns by hand. All I can really say about it is that I'm sure the $100,000 price on these amazing firearms is justified. With the time and detail spent on these things, and the custom designs, and long waiting periods, and money needed to keep the makers fat and happy, I'd imagine your getting mostly what you pay for.
On the other hand, it's all about status and pride of ownership in most cases. But there are people who have the money and are so involved in one aspect of life that they are willing to invest that much money to have the absolute best that money can buy. So thats why it works. But I'm sure there are other people that are just SOOOO rich, that they buy that sorta stuff, just because they want to, and may not appreciate it as much as someone who really is fully involved with their purchase.
I'm personally the kinda guy who if I were really really rich. I would be more likely to spend $100,000 on a really really fast Corvette rather than $1,000,000 on an insainly detailed luxurious worlds fastest super car. So in that case, I would top out at $10,000 for a custom shotgun, I would never ever pay $100,000 for a gun that has no historical value. Like I said, I think anyone who does pay that much must have so much money that they are bored and really cant find anything better to do with it, or they are so incredibly interested in firearms that they want the absolute best that money could ever buy.
HAH! But what do I know... I only have some spare change at the moment
In the end, are these guns worth the money they are asking? I'd say, depending on who you are and what you make... yes. I know they put an incredible amount of skill, material, time, and creativity into making these things, and it's going to cost a lot. Thats just how it goes.
I'm just glad no one is spending that kind of money for a custom toaster!