Thanks for your advice, Dave. You are right, of course. There is so much rubbish being sold around. Well, what drew my attention was the "old German musical instruments family tradition" of Sandner. One assumes it is true. For, I have never heard of this maker. Apparently, the instrument is made in Taiwan and carefully checked and tuned etc. So, maybe it is OK, I don't know. On the other hand, many of these "well known" brands also originate in Taiwan. That was why I asked whether someone heard or had some experience with Sandner. I need that Alto! Looking at a second hand Conn 20M. Made where? In any case, made as a student model (whatever that means). Btw the market in Oz is much smaller for 2nd hand stuff and expensive.