With The price drop recently, it is not worth buying a "roller" without tires, TX, batteries, motor & ESC.
And think you can build it your way cheaper.
I have found this out, with the price drop, you cant build one, for cheaper.
But mine is one of a kind, at least for now.
Mine was almost a roller, just add wheels.
then TX &RX, motor, esc, servo
and a few other things missing.