I've owned lots of boats but never a PWC. My husband wants to buy (2) 1989 Yamahas. Anyone know anything about them? What should I be looking for when I go to see them? How does Yamaha compare to other brands? Like anything else, I'm sure the technology has changed over the years, but I really don't know anything about them to start with. Please help me make an informed decision. Thanks for your help!