Sixt takes 15% off car rentals nationwide with prices starting at $25.01 per day, as provided by ShermansTravel. (We found this rate for a 7-day rental on October 11 with pickup from Fort Lauderdale.) That's the lowest daily rate we could find by $8. Fees, insurance, and taxes are additional. Book this travel deal by July 24 for rentals throughout 2015.