What is your resident status in Belize?
No import tax on Retirement program, but tax due upon resale: shipping via boat from Miami,20% +1% tax due on the value of the boat in Belize, plus also on the cost of shipping, so if looking at E Bay for instance, look in Florida, and for sellers who will deliver to the terminal and be "creative" with bill of sale and delivery fees?

It's rarely rocket science, it's usually just math: then again if you can't do the math.......