Other State Registration

mowermech wrote:
"If an Idaho resident buys a vehicle outside of the state, use tax is due (with credit given for taxes paid to another state) on the fair market value at the time it enters Idaho."

What if the vehicle never enters Idaho?
As I previously stated, YES, you CAN register a newly purchased vehicle in another state, but you may have to keep it out of your home state forever!
I have done it twice, buying vehicles from CA dealers. Since the dealer is the DMV registration agent for the state, the dealer title clerk MUST collect the sales tax, and register the vehicle to the new owner. They did that, and the paperwork was made out in my name, with my Montana address! Yes, as soon as I got home, I had to transfer the title to Montana and get the proper Montana registration. BUT, if I had never brought either of those vehicles home, I could have driven them with the CA plates for the full time I owned them!
Private party purchases in CA are entirely different. the seller hands the buyer the paperwork, and the buyer takes care of registering and paying the tax. If the final transfer is done in another state (where there is not tax), no tax is paid. I have done that twice in CA, too. One of th0ose was a Nevada car, but the sale took place in CA and the title transfer was done in MT.