I live in Hawaii, and I find that we usually follow normal US pricing. Our sales tax is lower (technically its not a sales tax...), but otherwise, I think the prices will be the same as they are in say California.
Things like Target, Costco, etc are more expensive (like 10%) here but I think that is because of the shipping. We are just grateful to have a Costco and Target
Given that, like I said, I have not seen those differences when shopping at Chanel,
Nordstrom, St. John, YSL, LV, etc here in Hawaii... my husband wishes ! LOL
Hope that helps.