I own an Attalia from '83. I also try and get my hands on anything Jeanneau (and in my case the Attalia) including the Jeanneau owners network.
We've owned Waymar since 2003. - No complaints so far - well built and well thought out (especially for the time). She is the first "non-daysailer" we've owned so I cannot compare boat ownership issues.
On the issue of charter etc., other more experienced sailors will have to weigh in with advice but I'm sure they will mention a professional and extensive survey. You will of course ask the current owner what the history of ownership was but take that for what it's worth....
Now based in Barbados.... and wait for it.....the boat is too!
Waymar - Jeanneau, Attalia