What kind of lock picks should I get?

I just feel like picking up a new hobby, and lock picking sounds fun. Don't worry, I'm not using it for B&E, well, until I'm good enough for Fort Knox, but that's like, 3 weeks away. Anywho, can anyone tell me where a good site / place to buy the tools, either separately or in a set, for cheap is? Also, if buying separate (which most likely would be cheaper), which tools will I need to buy? Thank you.