What's the average cost for the orbera balloon in Florida?

The Orbera cost will vary by practices, but the range would be from
$6,500 to $8000
You may find a lower cost but make sure there are no additional or hidden cost on the lower end, since some practices will charge for follow ups visits. The only additional cost you may see in some cases will be pre-op medications which are usually  covered by patients' insurance. 
With the one year program, which includes the Balloon, endoscopic procedures (placement and retrieval) ; all facilities fee including anesthesia;  all follow up visits; nutritionist and a team which will motivate you to reach your weight loss goals is what you can expect and should be looking for. 
It is very important to meet your physician and have the confidence and trust to do this procedure!
Hope this helps you!