I just checked the rates at LAX. I'm traveling July 18-22 and was hoping I might be able to get a better deal on a Merc CLA250 than the Audi A4 I'm getting with Silvercar. Not even a chance. $250/day.
Also, to those confusing "in-airport" with "off-airport location". There are NO in-airport rentals at LAX at all - all rental companies are off-airport.