The Steadicam was invented by Garrett Brown and generally costs in the neighborhood
of around $40,000. It simply makes your shots totally fluid, no matter what the terrain. Whether you are moving over rocks, sand or grass and your shot will look like it was done on a dolly in a studio. To find out more about the Steadycam profession version, click on one of the images below.
There is a consumer version available called the Steadicam JR. To find out more about the "Jr.", just click here.
My favorite links can be found here