I am buying an RC buggy and i want to buy a camera to attatch to it.?

the car is at

http://www.nitrorcx.com/51c802-firered-24ghz.html

i would like advise on a camera with memory (i want to record) and also the ability to let a screen, preferably portable and 5"+, see everything through the cameras eye in real time! I would like to keep it cheap and the video quality does not need to be high. I would like to keep the camera and screen under $70!

Thanks!

Not possible for $70.

A great little camera for that purpose would be the Hero GoPro.