I briefly thought about doing this. There good margins for dogs bought in TN, AL, MS and sold in FL. However, the FL has a number of restrictions that make it relatively expensive if you want to do it right regarding vet checks, age you can sell, vaccines. Not to mention there is a lemon law here, so you could get stuck with a hefty vet bill if the dog gets sick and they want to treat it. All it would take is a couple of sick puppies exposed to Parvo or some other disease, or even just a treatable birth defect and profits would be sucked up pretty quickly.