I always get the best prices with Auto Slash. Their "Track Your Car Rental Price" feature is amazing. Once I decide on my upcoming rentals, I will register them with the tracking feature and will know that I am guaranteed the best price. I wish Auto Slash would also provide a price comparison on insurance too. For foreigners, that would be a tremendous help since the total cost of ownership changes with additional insurance. As a foreigner, I feel compelled to purchase damage waiver and liability.