can i run some figures past you
I have never sailed one of these, or even seen a picture of one before today so what I am about to say is only based on broad generalities that can be deduced from the numbers and the photographs.
I will start with some of the basics. While you call this a long keel, by any traditional definition, this is a fin keeled boat with an attached rudder. Semantics aside this keel set up offers the worst of all worlds. It neither provides the supposed tracking of a long keel, nor the improved ability to support the boat in a grounding. The rudder being close to the bottom of the keel has more exposure than is typical on a fin/keel spade rudder where the rudder is generally significantly shallower than the bottom of the keel. A fin keeled boat with an attached rudder does not offer the light helm and easy manuevering of a fin keel/spade rudder boat, the ease of backing, or yaw moment of inertia which can help tracking even on a boat that does not have a long keel.
The beam is quite narrow, that tends to produce a boat that is tender and rolly albeit with fewer harsh accellerations and de-accellerations. With the high cabin structure, generous ballast ratio and narrow beam you would expect this boat to have a very large angle of ultimate stability. With the deck layout that is a good thing as downflooding is likely to occur in a knockdown and roll over and with the narrow beam, short sailing length and high top hamper, both are likely occur in really bad conditions. (The rule of thumb is that it typically requires a wave height equal to the beam to roll a boat through 180 degrees so that the narrow beam suggests a greater propensity to being rolled but also a greater propensity to survive the roll if you don''t downflood first.)
The high coamings can hold a huge volume of water and so would be slow to drain if the boat is pooped. Given this huge volume below the coamings, and the compartively low sill on the companionway and the large sail locker lid, downflooding is very probable in a major knockdown or pooping. The boat has a very small bilge area making for a very wet interior. With the high coamings, I would avoid the outboard in a well model as it would spend a long time under water if the boat is pooped and would need to be treated as an outboard that was dropped over the side and recovered after a major flooding. That outboard configuration violates US boat building regs in place since the late 1960''s.
The full bow sections are likely to pound in a short chop and to be very wet when going to windward in a seaway.
The narrow beam suggests a boat that will somewhat cramped down below although this is partially offset by the high cabin structure. The interior plan shows a fair amount storage but most of it is high in the hull where it will hurt stability. The galley appears to be tiny, even for a 25 footer and the dinette looks to small to really be of much use in any real sense.
Then there is the age issue. This getting to be a very old boat (18 to 28 years old). In any boat this age you can expect to find some ''issues''. Unless very well maintained and updated by a previous owner, you might expect to need to address some combination of the following items:
∑ Sails, chainplates, mast step and associated suporting structure, standing and running rigging that are beyond their useful lifespan,
∑ an engine that is in need of rebuild or replacement,
∑ worn out or out of date deck, galley, and head hardware,
∑ worn out upholstery,
∑ Out of date safety gear
∑ electronics that are non operational, or in need of updating,
∑ electrical and plumbing systems that need repairs, upgrades to modern standards or replacement.
∑ Blister, fatigue, rudder, hull to deck joint or deck coring problems
∑ Keel bolt replacement (bolt on keel) or delamination of the hull from the ballast for a glassed in keel.
∑ And perhaps a whole range of aesthetic issues.
With an strange little boat like the one in question, the value of the boat will be limited by the design qualities of the boat itself and so the costs of these kinds of repairs and upgrades can quickly exceed any fair market value for one of these boats by several times.
I would think that there are much better 25 footers out there for your purposes. I would think that if you are really seeking a long keeled boat with narrow beam, one of the folkboat derivatives might make a more seaworthy choice. Otherwise, I would suggest that a more modern design with a fin keel and spade rudder should offer greater ease of handling and better performance over a wide range of windspeeds.
Then again I have never sailed one of these.