30 years old Benetti

I would like to know if any of you could suggest me if buying an old "navetta", built in the late 60s, around 30/35 meters long, is the right thing to do, being the yacht of an old conception. Are yachts like this difficult and expensive to maintain? Are they confortable at the anchor? I have heard that they are not that stable... Isn't the plumbing of a too old design? How about holding tanks? Any suggestion or general info is very welcome, thanks!

Modified by basics at 10:26 AM 3/1/2005