The Bayliner Owners Club www.baylinerownersclub.org
has a wealth of information and owners of that exact model.
Myself I have not heard of stringer problems with the 45 and 47' pilothouse models, and honestly I probably would have heard of the problems.
Things to look for are radar arch issues, and leaks as others have noted on deck surfaces.
Remember that these boats are now approaching 40 years old. The condition will be based on previous maintenance