Richard,
Hands up and step away.
Step away from the boat.
Further away.
Ok, now run!!!!!!
Seriously though .....
You''re talking about the rudder skeg and not the keel correct? Not that I think it would really matter. Although if it''s the keel, then it may be a question of replacing keel bolts refairing etc. Not that simple or inexpensive but ......
If it''s the rudder skeg, then I''d be thinking about the mechanics of the rudder, damage to the hull, at the joint and in other places as well. Damage to the
propellor shaft maybe?
I don''t know the Tartan''s at all, but movement of 1/4" with a large crack at the hull joint doesn''t sound like a simple repair.
It''s a bit suspicious that it''s not repaired, and that would give raise to suspicions about other maintenance too.
Unless it''s REALLY cheap I''d keep looking.
just my 2 cents
Craig