It's an interesting phenomenon that AP scopes are sold new at below-market price. You can always tell when they release a new run because ads start showing up on AM for new-in-box samples at around a 25% premium. Actually used versions of current models run 15% to 20% above list price. So, in that sense, they are not among the most expensive as offered to amateurs.
The Planewaves are sold in amateur-oriented sizes, along with sizes that are meant for institutions. There are plenty of amateur astrophotos on Astrobin from Planewave scopes. A 20" is currently for sale on AM for about $30K. I sometimes think of them as the modern day Boller and Chivens, although I don't know of any amateurs who bought B&C scopes new.
I remember being told, when I was at Kitt Peak, that there was an observatory for sale on the mountain for $1M that had built by a wealthy tech exec who decided he wanted to get a PhD in astronomy, but couldn't be bothered with trying to apply for time on an institutional scope. Technically, he bought it as an amateur. I don't think they mentioned the brand though.
Chip W.
That is why i say AP's cost the most. I never go by new prices since i never buy new.