You are getting a bad price. I checked carrentals.com and with nothing other than the dates were able to get cars for that timeframe from $404 up (including taxes). Fox and Advantage seem to be the least expensive. Fox of course is off-off-site (bus to rental car center then shuttle to Fox) but its a one-time thing.

I did Advantage with the "AAA" discount code and got the following (and that was without any type of research):