I paid $1,675 for a 1991 model, without sails, and plasitc rudders. It depends on what kind of shape and equipment you are getting. Race Rudders is a plus. Inspect the hulls, tramp, and sails for wear and damage. Be sure the mast is straight. I didn't notice it until I got home with my 91 that the mast is slightly bent. If everything is in good shape, a 1996 model with a trailer may be worth $3,500.
It is hard to find a mid to late 90s boat. Not many of them on the market. I think that you are money ahead to purchase a later model.