Ferrari 360 Spider - 950$ per day, 6650$ per week
Bentley Flying Spur - 1200, 5950
BMW 650i Covertible - 299, 1795
Mercedes Benz S550 - 380, 2090
Jaguar XK Convertible - 350, 1700
Ferrari F430 Spider - 1800, 8750
Bentley Continental GTC - 1400, 6450
Lamborghini Gallardo Spyder - 1400, 7950
Chrysler 300 - 122, 609
Rolls-Royce Phantom - 1800, 12600
Porsche Boxter - 179, 1179
Viper SRT-10 Convertible - 499, 3493
Lexus SC430 - 349, 2094
Audi R8 - 1800, 10800
Aston Martin V8 Vantage - 575, 4025
Mustang GT Convertible - 100, 630

according to http://www.findexotic.com/c/1251_losangelescarrental.htm