Well, since we're into comparisons and I'm bored, I got this stuff on Tower to give you a decent idea what the cost would be for a kit.

RC10GT Team kit: $244.99
Futaba 2PL* w/ 1 S3003 servo: $69.99 (this will also include a reciever; standard servo is for throttle)
Futaba S3305 high torque metal gear servo: $37.99 (for steering)
OS .15 CV-X w/ pullstart: $89.99
Total: $442.96

*The 2PL is a computer radio, but IMO it would be worth going ahead and spending about $20 more to get one for things like the digital trims.