I would never assume the stringers were ok. I am under the opinion that all 2001's have some sort of wood rot, unless they've been completely redone. The only way to know for sure is to core into the side of the stringer, only cutting through the fiberglass to get a look at it. You can check the engine mount lag screws, but this is not fool proof. Like mentioned above the2001.com and www.correctcraftfan.com
are great sources for these boats, tons of good info that you definately want to read before purchasing.