To be honest about the supercharger on my 06. I had it rebuilt the first time at 225hrs. Now it has 300 and it probably won't be touched till I sell it or hit 500hrs. I up keep my ski and never really had a problem with it besides a starter button. Should be a great ski. Check for dock marks...
Where are you loacated. I have a guy who does all work for local dealers and he is cheap when it's cash. Try finding someone to do a cash job with sea doo gel coat