It was about $1,000 for 24 hours. $800 for the rental and you get 50 free miles, then it is $3 a mile after that, and I went about 75 miles over... because, well... why wouldn't you?!
I did have other options from a McLaren MP4-12C Spider

Ferrari 458 Spider

Lamborghini Huracan LP610-4

All of these were rented out at the time, and bit more expensive. For another time though ;)