I bought a kit and assembled one for 2 bills and the motor cost $75 7 yrs ago. It ran on electricity and went up to 35mph, that's still pretty fast. Doing donuts like it was nothing, shit was sick. You have to have handles on the controller or your shit will smash into somethin vicious. Assembled gas powered ones are cheaper, just go get one that goes 50mph. There's even some races, people go out to events and race them in the tracks.