In Need of a cheap audio and video mixer

Danny, if you want the most basic way to mix multi video sources, check out this switcher. Nothing fancy, but for @$50.00 you can switch between 3 cameras. There are probably other switchers like this available with even more source options, but for a simple show this could do the trick.

http://www.radioshack.com/product/index.jsp?productId=2286098&filterName=Category