2014 sj value

sorry I've been posting a couple threads not trying to seem like an a** or tire kicker. I'm getting ready to pull the trigger on a 2014 sj with supposivly less than 40 hours on it. I believe the ski has been kept on a dock on a freshwater lake it's whole life. Is there anything I should look out for and is $5500 a good price. I plan to learn on this ski and make it into a surf ski as I progress.
 
Is there anything I should look for to tell age? I'm very familiar with 2 stroke dirt bike motors don't really know what to look for in a ski. And what parts are more susceptible to wear and tear that I could check
 

Vumad

Super Hero, with a cape!
Location
St. Pete, FL
Primarily corrosion and compression. Otherwise it's just that it runs crisp. A stock Superjet has pretty smooth power. It's not like a dirtbike with a clutch. A superjet with a pipe might be a little more light switchy like a dirt bike would depending on how it's been setup.
 
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