A few years ago a Nautaline transom and stringer job was in the area of $5000. Most old Nautalines that still exist today have had or need stringer, transom, deck and roof rot repair work.
The problem normally progresses to humping of the floor in the galley area. Also shows up in other brands but Chris Craft and Nautaline are the most prominant offenders.
People will often sell these things cheap or even give them away to avoid storage/dockage fees and disposal costs.
Anybody considering an old Nautaline should read both pages of this thread.
http://www.houseboatingworld.com/forum/forum_posts.asp?TID=2 051&PN=2&TPN=1
OLD HOUSEBOATER38762.9397337963