[willy]

Look for cracks along the bulkhead which is the wall you step thru going into the cuddy, cracks running along that floor wall seam and out from it are not good.Minor small or thin ones are not a big problem, yet, but a sign of something coming. Maybe years down the road. Cracks that run all along and especially radiating out are a sign that the bulkhead is rotted out. I found two or three of those while I was shopping, also sit in the helm seat and rock back and forth and look for the floor flexing a lot there.
Soft spot in the cover over the gas tank is common due to cheap construction and support there by Wellcraft and a fairly easy repair.