If you are renting for Disney, go on Mousesavers.com. They have a list of codes for discounts for different companies. It also tells you which companies are the "value" brand of the more expensive companies. I also check through Ebates and retailmenot.com for coupon codes for whichever companies I am checking. When I was looking for a rental car for DS's soccer tour. in Tampa, for 5 days, starting on a Wed.,was only finding rates for $200+. It didn't qualify for weekend or weekly, which made it harder. But I kept checking, and found the coupon code for Alamo, which ended up being cheaper to start, had a free upgrade to midsize, and then with the code came to $127, and I got Ebates % as well! SW did have discounts, as did BJ's Wholesale Club membership, but neither ended up being better.