Should I Pay $100 for My History?

I stumbled across this the other day: National Geographic has the Genographic Project to research the human journey. It includes a kit you can purchase to test your DNA and get a long term genealogical history. The website has this to say:

Your results will reveal your deep ancestry along a single line of direct descent (paternal or maternal) and show the migration paths they followed thousands of years ago. Your results will also place you on a particular branch of the human family tree.

I can't decide if I should get the kit. The problem is that the kit costs $100. However, it could tell me some fascinating things about my past, which I would of course share.

I'll probably end up getting the kit; it is too tough to resist. But I'll wait until the money I spent on the Ancestry website is further behind me. After all, the next generation of Cheney / Keenan / Eisenberg / Blake etc is on the way and I need to conserve my resources a little better.