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a good friend is looking to purchase a vanagon for use in Hawaii
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Sorry, I don't have any specific info, but, I lived in Hawaii for a
total of 35 years before moving to Maine in 1999 and I can tell you that
Vanagons are plentiful there.

Due to the cost of shipping from California, and the availibility of
Vanagons in Hawaii, I'd recommend your friend look to purchasing there.
Even if it were to be purchased on Oahu, the cost of shipping from there
to the Big Island is not that great.

One thing to be careful of, though, is the possibility of rust.  If an
automobile isn't washed frequently and/or if it was parked or used very
near the ocean, rust can be a concern.

Mike
Houlton, Maine