I realize this is a little late, but maybe it'll help someone else that comes across this thread.
California is awesome (not) when it comes to taxes and registrations. They *really* don't want you to bring a new or near-new vehicle in from out of state. The two specific areas that hurt are...
and
What this means is if you buy a new car and bring it into CA it must have more than 7500 miles. Not only that, if you bought the vehicle less than 1 year ago you have to pay the state the difference in sales tax from where it was bought and where you live. I *believe* the DMV only applies the county tax rate.
So say you bought a car out of state 6 months ago and paid 5% sales tax, now you want to register it in CA. If your county sales tax rate is 7.75% then you have to pay the 2.75% difference. They're nice and give you a tax credit since, obviously, it's illegal to make you pay sales tax twice...so instead they just get you for the difference. :icon_evil:
Buy in Oregon (No sales tax) and you'll be stuck with paying the whole amount. On a $32k sale that's nearly $2500 you'd have to pay the state if your local rate is 7.75%.
Oh, BTW, the "use tax" applies to ALL vehicles bought within 1 year, new or used. Basically, don't buy out of state unless the deal is so awesome that you will still be ahead after paying the taxes.
Isn't CA awesome?