Even seeing them in person won't help much as pretty much no one sells blooming dahlias - except the dwarf varieties that are sold in pots. S Fla is not the easiest place to grow dahlias, they don't tend to like lots of super hot weather.

I have seen the dwarf varieties at the big box stores and nurseries. Otherwise, I tend to get the bare roots from the box stores also. If they are not good for your region, you might not find them in those chain box stores.