Thanks for the update. It sounds like they have a "loophole" in the FL tax law.
In TN and in FL there are some very strange laws since we have no income tax.... so Sales tax is vital. For example if you are stationed at Fort Cambbell in TN you can buy a car tax free, but not if you are at any other base in TN (for example, the Navy base in Millington, TN) It is just crazy!