I have found a large marine, owners boat, that looks like it is in great shape.I have not sailed since the 1970's, so I'm a little rusty and need to learn again. The boat is as clean as one could hope for a boat of this age (1978) Is it a good starter boat, is it easy to sail and maintain? What are some of the problems this model has had from this era? The asking price is around $15,000, so what might be a reasonable offer? It has been stored inside, most of it's life.Thanks for any in-put