ya, I definitely wouldnt buy a used one. Are there any cars with a little more space- for the esc, or overall. the thing is, i have to fit a gyro and a microcontroller on a board inside this thing, and a few micro servos if possible. extra money for the esc wouldnt kill me, but this car will be a test bed for some aero research im doing- so the likely hood of the program glitching and wrecking the car is high. Be that as it may, I'm looking at the novak xrs for 50 for now(14T)..and once I get the program working and need the extra speed, I was looking at the quantum reverse 2 pro/bullet(12/8T), or possibly something that can handle 3S lipo. I would have gotten the quantum reverse super, but its 90 and has the same specs as the novak.