The bottom of the keel missing itís paint
reminds me of yachts that I survey
that are in berths that are to shallow for them and the bottom bit of the keel spends half its life in mud. Which then stresses the keel hull
join and possibly the interior
floors. The engine main seal could be another can of worms. If he has the part why has he not replaced it yet?
I am not sure I would purchase
this vessel unless you can do all the repairs