Sixt takes 15% off car rentals throughout Florida with prices starting at $8.82 per day, as provided by ShermansTravel. (We found this rate on September 1 with pickup from MIA.) That's $2 under our July mention and the lowest base rate we could find for select rentals by $1 per day. It's valid at participating locations in Florida only. Fees, insurance, and taxes are additional. This travel deal ends August 31 for rentals through September 30.