Am probably gunna buy a 14 Hobie off a buddy. We have no idea what a "fair" price for it is. No trailer, probably a 5 or 6 on scale of 10. Trampoline ripp'd (my fault due to old age of material but I did the damage). Most ropes could be replaced, blah, blah, Any thoughts on what one should go for? Oh, early to maybe mid 1980.... ???