What are the most important considerations for a boat buyer?
Okay, we learned a few years back a little thing that can be overlooked (before ever even talking to a surveryor). It''s amazing how many boats had this problem when we started looking for this particular problem.
Walk around on the deck in a bouncy (not jumping) manner to check for weakened areas of the deck and upper cabin. It can be fixed, but depends a lot on the area and size of the problem.
All in all, weak (soft) spots on the deck and upper cabin is a problem to look for. It can be from leaky cracks, etc. but poses the question of "what else has this damage?" (hull, walls, flooring, etc.)
But always, after your inspecting the boat (and don''t be shy!) get a survey.
We currently have our boat for sale on this message board, and we encourage people to lift floor boards, open everything, bounce the deck, and spend a while on the boat. If the owner or broker rush you, they could have something to hide. Not to be a bubble-burster or pesimist (spelling), but better safe and knowledgable than having to spend lots of money later.