Your right, there are crazy things out there which don't make sense to some and totally justified to others.
I always considered myself in the camp of searching for the best sound i could afford. I never cared for brands or hype. If Sears made a tea kettle that produced the best sound, i'd investigate. Then there's audio enthusiasts that are in the collectors camp, yes they want good sound, not necessarily audiophiles, but they also collect a whole bunch of gear just to collect it. I mean there are people crazy about 78's from the 1920's and you can say what you want, they sounded like crap then and sound like crap today.
Of course people can sell these and anything for what they want, but that's just my point, from a psychological perspective, Sansui 9090db was selling for $400-500 10 years ago, the product's never changed, its still a Sansui 9090db, and people knew then it was good, the sellers knew, the buyers knew, so something else has driven these prices way up... I just think these things are now over priced... That's all.