No! X1's St. price is around 2.8k for brand new. It is the most update high end racing car from 3-racing. But of course if it is second hand, the price vary and determined by condition. I think around HKD1.5k for the car only. Your servo should be futaba 9550 series. Cost at least HKD300 for a 2nd hand. Are you using FASST system from futuba? Beware of the antenna, it cannot bend and should protect within plastic tube. It is hard to tell about your ESC. What model indeed? If it is version 2 120A, then it is as same as what world champion is using. Cost around HKD500 in second hand market if it is. It also equal to speedpassion ESC. With suitable firmware, it can open turbo for you and 5.5t will become a rocket. In short, your car and gears are robust and capable to enter A-main mod!
Your system worth at least
Car: 1.5K
ESC: 0.5K
Motor: 0.3K
Servo: 0.3K
Radio system.... 4pk? or what?