Initials GS by any chance? If so, you made the right choice.
It is not GS, but I am very curious about who that may be as I am now looking for someone to properly maintain the piano. Please send me a message if you don't mind.
I have decided to go ahead and buy the piano.
There are many reasons. One of which is that I could perhaps in future use the piano as trade on a grand if I ever have enough space. The rarity of the Bosendorfer makes this much more viable too.
Also I really love the sound of the Bosendorfer. This one has a wonderful full, rich and warm tone. It is evident, even in untuned and unregulated shape. The ability of this piano to fill a space with sound is most impressive as evidenced by the first few bars of Rachmaninov 2 played by a friend. I would certainly not lump it with "uprights".
Its very beautiful to hear its pure tone fading away perfectly evenly when holding a key or pedal. The action may not be as light as the old steinway I practice on now, but it is very, very precise and will lighten up a little with maintenance and playing and I don't like too light an action.
I have tested new Kawaii and Yamaha, which seem to be the common brands to get new. I have also tested used Steinway, Grotrian, Bechstein, Seiler and some lesser known brands, all are cheaper by a fair amount and none even remotely as new as this piano. None of the ones I played on have the sound I am looking for (The Grotrian came close though and the Yamaha is also very good). I would have loved to try a Bluthner, which by research also has a very wonderful tone. As I mentioned before I quite enjoy my restored R. Gors and Kallmann. Not a great brand even though mine has a tone like a winter fireplace fire - warm and cosey, but as I learn to play better and hear better, I can already feel limitations in its action for my style of play and start to hear some tinny-ness in the trebles that I couldn't hear before.
But in any case.
As many would say, in the end it matters how I feel about it and in the end this piano speaks to me, telling me that I should learn to play it properly and explore all the sounds it can make.
Playing it makes me feel that it will be a mentally and emotionally rewarding experience. Enough so that it already made me increase my practice times to be better so that I can make the piano sing.

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What is a little more expense compared to that?