BigDave20 - Congrats on your new Boxster! As a fellow Speed Yellow owner, I must warn you that you will get a LOT of attention around here!
The PeachState club is very active and is definitely worth checking out. We have monthly meetings (called Socials) usually the 2nd Monday of the month. The next one is at the Big Ketch in Roswell on Sept 10th. Even if you don't plan to join, stop in and meet everyone - it's a great bunch of people.
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Georgia doesn't have an auto sales tax, but we do have an "Ad Valorem Tax". It's based on the (states perceived) value of your car. It used to be charged annually, but all car purchases since March 2013 are subject to a one time "once-for-the-entire-time-you-own-it" tax. Instead of paying a little bit each year (which decreased slowly to zero), they now hit you with one big lump sum up front.
From what I can see using the calculator on the GA website, you will owe about $365 in Ad Valorum tax. While cheap compared to a sales tax, it's still not zero. Uncle Sammie (or in the case Uncle Nate) is always reaching into our pockets...
https://onlinemvd.dor.ga.gov/tap/Option1.aspx#message
Again, awesome that you bought the car and are going to drive it back here from there!
Safe travels!