What are your pickup and return locations? Many agencies frequently let customers pickup their car in one Florida location but drop it off in another location without a drop charge.
Otherwise look at the total rental price. A customer who rents a car in the NE but wants to drop off the car in Florida will be putting a lot of miles on the car. Unless the rental agency is looking to reposition cars (seasonally) the agency will want to be compensated for the high miles. Sometimes a drop charge. Sometimes limited (or no) free miles. Sometimes all discounts will be blacked out. There won't be a drop fee itemized but the total price will be high.