All states can impose sales tax when you enter into the state to take delivery of the vehicle, as California does. Then, whey you get to your home state, you pay use tax. However, all states give you a credit for tax paid upon delivery, and you would only owe additional tax to the extent your home state's tax rate is higher than the rate imposed in the state you take delivery (again, see CA-WA posts above)
Some states will allow you to come in, pick up the car, and drive it out without tax being applied....GA is one of these states.
Got it, sold it, now what?