Is it possible for a high end manufacturer to overprice their goods?

in luxury goods, price is one component of the value.  The manufacturer is not selling a function, they are selling the brand. Add limited production-  reduce the supply for the same demand and price may be increase even more.

The best part is: they don't need to sell any. They can keep selling the midrange stuff and claim trickle-down buzzwords and increase its price by 10%

Anything is possible 

No.  Fair market value is what a reasonable seller is willing to sell the product and what a reasonable buyer is willing to pay. If any product is sold, opinions from non-experts are worthless. I have some strong opinions about Hermes hand bags, but no one cares. 

@markalarsen The assumption of a fair market is the root of most problems in our world. There is no such thing as a fair market. The values are rigged or influenced by actors in that market. A direct example would be a monopoly, or oligopoly. These things inherently exist in any market, it's just a matter of time. 

Furthermore, the line between non-experts, experts and salesmen is very very thin and blurry. 

The value of Hermes handbags is 90% the brand and the assumption that its value will rise over time (due to limited production run and high demand). The physical object is worthless in comparison. The NAD 3050 LE is making a farce out of us. NAD will no doubt release a dozen similar amplifiers with slightly different features and specs. The NAD 3050 LE is selling like hotcakes because it's "limited edition" and it looks different. It also helps that the amp is predictably good in an NAD fashion. "You can't go wrong". 

So if you view Hi-fi like Hermes handbags, you'll be buying gear based on re-sale value. Not performance. That's probably the smartest way to go about it. I mean these vintage Pioneer and Marantz amps from the 1970s are shooting up in value because of "Hi-Fi influencers" (which are typically vintage shops trying to move products). You may as well buy them and sell them later for a profit. 

Lastly, there's no such thing as a reasonable buyer. You either have cheapskates, gear flippers or fools. 

I don’t know the answer to your general question about price evaluation. I can say some things on the specifics of the Orion. You reference hyperbole in the review and I can understand why if you’ve never heard the Orion. That happens all the time with reviewers. In this case in my opinion none of it was hyperbole. I heard Orions in the room that housed Wilson XVX at the Sound Environment in Omaha. To me the Orions are a better overall speaker than the 345k XVX. When Peter set up the XVX they held a presentation as they did when Josh set up the Orions. I’m told there were about 10 attendees that made it to both presentations. As stated in another Audiogon thread and verified by me with the folks at TSE almost all preferred the Orion. It’s a GREAT speaker. Now if you’re a horn guy you may not like them and that’s fine. To each his own. If you are a dynamic speaker guy and you listen without bias you can not help but be impressed. As far as cost goes consider 5/1 cost to retail as a starting point. Does Orion have 30k in cost? Well look at the video on its construction. 360 pounds of cast aluminum and carbon fiber! Every driver is new and was created specifically for this project which took 3 years to develop. Rockport is a small company. How would you amortize the engineering costs for this. Each driver was engineered fully by Andy. Nothing is off the shelf. Every speaker is listened to and measured by Andy and Josh. No two drivers or cabinets are exactly a like so each crossover is fine tuned by the owners before it goes out the door! That is not efficient but it is beyond amazing. Most sane people would say it’s absolutely stupid to pay this kind of money for a stereo. They have a point. In the world of relative value in this crazy hobby I would say these are fairly priced.