It's interesting to hear the Rosler name, as the first piano I played about 30 years ago was a Rosler. Then my mom purchases a Petrof, and I played it for the next 10 years. I played a grand in a concert hall in my home town a few times, and it was a Petrof. So these pianos define what piano "should" sound for me
When my sis was shopping for piano at around 1995, we played many different pianos and settle for a Petrof upright. Few years later when I shopped for piano, I ended up with a Petrof upright too. Now, I'm shopping for a grand, and who know what I'll end up. Our local dealer no longer carry Petrof though! So far, I felt Estonia is the closest to Petrof (& probably better, but hard to define this).
Sorry to post something irrelevant, but can't resist because Rosler was the 1st piano I played. Hopefully you will find a good buyer for the piano.