Keithr, you make the salient point--no subs included in the price. The seller is selling the subs separately for another $7K taking the price to a mere $20K!
The speakers look to be in fine condition, and with subs, $20K is not unreasonable, but, IMHO, it isn't some kind of a steal.
Lubachl, I'm the Trio owner that Hifimaniac referred to in his post. Indeed, your experiences with the Trios is quite different from my own (though I do agree they tend to sound better with tubes and that you can listen to them nearfield if set up appropriately). Perhaps you have a room that, for whatever reasons, is complimentary to your Trios. Either that, or you are a lot less critical of their sound than I've been. It has taken me years to get them to a state of respectability. I find the Trios are extremely revealing of anything and everything upstream.
Don't mean to be contrary, but that is my experience.
Dean