Re: Looking
Is there any particular reason you are looking for a jet boat?
Have you ruled out an I/O or even an outboard? For the same money you could probably have a better performing boat with a prop, especially for the tasks your are looking for it to do.
Jet boats of that vintage in that price bracket are great for zooming around and burning gas. When it comes to pulling wakeboards, skis or even tubes, they aren't ideal. They rely on a jet of water to keep them straight or make them turn. When pulling someone behind it that is trying to turn and do tricks, the jet form of directional stability can be challenged.
Speaking of SeaDoo specifically in the mid to late 90s SeaDoo had a couple of pretty good 2 stroke motors. The 717 and 727 80-85hp motors are pretty good. They put one those in the first sportsters and two in the speedsters. They aren't shy about burning gas and breaking down frequently. For your $4k you should be able to get a very nice example of the speedster with 2-85hp motors. For a while after that SeaDoo actually used Mercury power for their jet boats. I don't know much about those. Now they are all 4 stroke motors that seem to be very comparable with anything else on the market.