My preference is for an active preamp but done as simple as possible. I chose CJ's ART and ACT 2.2 for my pres "first" because I like the way they sounded and "second" because of their design: Class A, only one gain stage, no negative feedback, and no cathode follower. For an active tube pre, that's pretty simple.
So here's a case where a pre is simple and expensive. I wondered if it was because they were the companies statement product and, in the ART's case, because only a limited production was made. I'm sure that's part of it but finding that, in the ART 3's case, it uses 32 Teflon caps at a cost of about 300 each. That alone works out to 9000 in just those parts. Does it need all those to work? No. But that was CJ's decision. Do I need to pay that much for a pre? No. But that's my decision.
Hypothetically: If someone was to invent a raw driver that outperforms every other driver in the world and cost 100 in parts....If he puts that into the perfect box that cost him 100 in materials....and if it takes him an hour to assemble it (we'll give him a 100 per hour rate)....Can he charge 300 for it? Can he charge 30,000? Yes and yes. First yes: If he's a Saint. Second yes: If there are people that will buy it at that price. In the latter case, I'm sure some people will wonder why he charges so much. The short answer is, "because he can". A better answer is: "It took years and a lot of money to develop this and I have a family and a business with overhead I have to take care of".