The Island will most likely be $20. The DLC costs so far are around $45, no joke.
BTW, bought both Boosts, the Toy Bike, and the Toy GT Concept. I'm impressed with the Toy Bike just for the Bikers' animations. So funny. But I'm mad that I can't change his outfit!
Hawker Mech looks crazy, L3 changes its' Boost Type (So it can be like a Speed car, but it can't get Burnouts, Boost cars, or Aggression cars)
The Extreme Hot Rod is basically infinite boost, it's locked on until you crash. Hitting X again won't do anything.