I checked out the ebay page.
Looks like they put together their own custome rig. This is pretty simple to do. The only hard thing is the video down link but that is not to hard either. All this stuff is available for purchase from various manufactures
I found one turn key system that cost 10,000 dollars. WOW. But this one would go to a hundred feet and had an motorized extending rig. It has a platform that you drive your car onto to stabilize it. After looking at the price I decided there had to be a cheaper way.
I am also attempting to build a rig like this. I looked at ballons and that is a little expensive because the helium costs so much and there are issues with wind and stability. Kites are fun but again requires a lot of patience and can't be used is a lot of situations.
There are many manufactures of telescoping poles for all kinds of uses. A quick google of "pole aerial photography" or "PAP" as it is called will give you a lot of info.
Here are a few links:
This guy build his own and has a custom rig to attatch it to the hitch of a car
These people make fiberglass telescoping poles for all uses.
And this guy made his own as well and has a material list. All of it bought from Home Depot. There are no design plans but he has pics and some directions. His pole goes to 50 feet.
The last link is the rig I am building.