Hawaii is not competitive at all given that there is only 1 BMW dealership on Oahu. I do miss the competitiveness in CA as I lived there 4 years ago. Have been in touch with a few dealerships in SoCal, but would need to also account for shipping the car from Long Beach to Honolulu which is about $1000 plus.
If it is $1000 to ship you should do that. You will get a way bigger discount and possible no mark up on the buy rate. You should contact @BMW_Dave and see what he can do for you.