Dear Sergio,
Yes, they are very strongly built, especially compared to modern
boats. We have sailed her across the Atlantic and in different
continents, never worrying about the boat being able to take the
weather conditions.
These days there are many places to list a boat. Some are free (by
owner), some are with yacht brokers. Here is one free example in
Sweden:
www.batnet.se (but I have no experience myself).
I think your market would be equally Norway, Denmark ,Sweden,
Germany, and Finland. In Sweden they say the Germans have the
money. However I have noticed that Italians have a weakness for
S&S!
Best regards,
Leo