The Vette - I was able to book(WITH POINTS) when I originally booked.
Challenger - Had booked the cheapest car on the lot(pick-up truck) and when I got there they had the most beautiful R/T Scat Pack just sitting there. A staff member was going to rent it, but they let me have it.
Mustang - Had a base model Camaro booked, but they didn't have one on the lost. Think I paid around $15 more a day for the 5.0.
911 - Had a MB SLK 300 booked, decided I wanted to try driving a Porsche for the first time. I wanna say it came out to around $140, before I got every single coverage I could buy because I was worried about crashing it.