If GA is a title state, you would pay sales tax based on the purchase price stated on the back of the title. If a Non-title state, you pay sales tax based on the purchase price posted on a bill of sale. If it's a New boat, you usually pay a base sales tax to both states- 1/2 and 1/2 usually. I bought my used Triton from a GA owner and paid TN sales tax based on the purchase price on the Bill Of Sale. Just call your local Dept of Revenue in GA and ask them what the sales tax percentage is, on a vessel. You should also apply for a GA title when you get your registration. When you go to re sell, some states require a title. Like Missouri. People from a title state won't buy anything without receiving a title.