ODay has been out of business since 1989. S2 is still around but building power but not sure if they are even building sailboats now but if they are it would be the larger ones. They were considered good boats. Both boats would be 25 years old or older but in their time, both sailed very well but I would be more concerned with the condition of the hull and deck, equipment, motor and trailer. If you do not know what you are looking at, I suggest a knowledgable person to go with you. One thing, insist on the title work for the trailer and boat along with a notarized bill of sale. IF that cannot be produced, then walk away unless it was not required for the state where ownership occurs. Good example, North Carolina is a title state but older boats did not require a title. South Caroina, Tn, and other states do not require titling and registration on trailers while some states require only registration.