Was the deck
repaired immediately after the stanchion was knocked out? Has the boat
been in covered storage
since the stanchion was "popped through the deck" ? If not, there will have been water
intrusion into the hull
every time it's rained since. At the very least, there would have been condensation
and seeping. Then if you're in an area with Winter, the expansion and contraction of whatever amount of intruded water
with freezing and thawing.
You'll need a surveyor
to tell you the true state of the hull
before you'll have a clear idea of what she's worth. Otherwise, it would just be the resale value of the relatively new engine and boat parts
Hope it's not as bad as all that! I'm just trying to offer you a pragmatic approach.