That Johnson is a pretty common motor.
Your motor would be better used as a source of parts
IMO. as the power head has so much damage.
I would suspect the gears in the lower unit
mostly likely are junk also. There are parts
there though. The reversing lock is often broken.
If yours isn’t that a plus. Good props are always in
demand. The magneto may still be good. The
water drain screw is in high demand as there are
no screws of that thread size being manufactured
to replace it. What does the gas tank look like.
Good tanks are always in demand. There is a
motor out there you could save with what you
have and what’s left over could put some other
motors back in running condition. If your
just looking to pass it on the value is minimal
as they are so common. If your motor was stored
well with no damage the most it would bring
would be around $300.00 +/- but they can be found
for much less. I got one last month for $50.00
that with some spark plug wires and a lot of
cleaning will be ready for the water again.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.